Homer Laughlin China Date Codes


Year/Month

1911

1912

1913

1914

1915


January

1 1 N or 1 1 L

1 2 N or 1 2 L

1 3 N or 1 3 L

1 4 N or 1 4 L

1 5 N or 1 5 L


February

2 1 N or 2 1 L

2 2 N or 2 2 L

2 3 N or 2 3 L

2 4 N or 2 4 L

2 5 N or 2 5 L


March

3 1 N or 3 1 L

3 2 N or 3 2 L

3 3 N or 3 3 L

3 4 N or 3 4 L

3 5 N or 3 5 L


April

4 1 N or 4 1 L

4 2 N or 4 2 L

4 3 N or 4 3 L

4 4 N or 4 4 L

4 5 N or 4 5 L


May

5 1 N or 5 1 L

5 2 N or 5 2 L

5 3 N or 5 3 L

5 4 N or 5 4 L

5 5 N or 5 5 L


June

6 1 N or 6 1 L

6 2 N or 6 2 L

6 3 N or 6 3 L

6 4 N or 6 4 L

6 5 N or 6 5 L


July

7 1 N or 7 1 L

7 2 N or 7 2 L

7 3 N or 7 3 L

7 4 N or 7 4 L

7 5 N or 7 5 L


August

8 1 N or 8 1 L

8 2 N or 8 2 L

8 3 N or 8 3 L

8 4 N or 8 4 L

8 5 N or 8 5 L


September

9 1 N or 9 1 L

9 2 N or 9 2 L

9 3 N or 9 3 L

9 4 N or 9 4 L

9 5 N or 9 5 L


October

10 1 N or 10 1 L

10 2 N or 10 2 L

10 3 N or 10 3 L

10 4 N or 10 4 L

10 5 N or 10 5 L


November

11 1 N or 11 1 L

11 2 N or 11 2 L

11 3 N or 11 3 L

11 4 N or 11 4 L

11 5 N or 11 5 L


December

12 1 N or 12 1 L

12 2 N or 12 2 L

12 3 N or 12 3 L

12 4 N or 12 4 L

12 5 N or 12 5 L




Year/Month

1916

1917

1918

1919


January

1 6 N or 1 6 L

1 7 N or 1 7 L

1 8 N or 1 8 L

1 9 N or 1 9 L


February

2 6 N or 2 6 L

2 7 N or 2 7 L

2 8 N or 2 8 L

2 9 N or 2 9 L


March

3 6 N or 3 6 L

3 7 N or 3 7 L

3 8 N or 3 8 L

3 9 N or 3 9 L


April

4 6 N or 4 6 L

4 7 N or 4 7 L

4 8 N or 4 8 L

4 9 N or 4 9 L


May

5 6 N or 5 6 L

5 7 N or 5 7 L

5 8 N or 5 8 L

5 9 N or 5 9 L


June

6 6 N or 6 6 L

6 7 N or 6 7 L

6 8 N or 6 8 L

6 9 N or 6 9 L


July

7 6 N or 7 6 L

7 7 N or 7 7 L

7 8 N or 7 8 L

7 9 N or 7 9 L


August

8 6 N or 8 6 L

8 7 N or 8 7 L

8 8 N or 8 8 L

8 9 N or 8 9 L


September

9 6 N or 9 6 L

9 7 N or 9 7 L

9 8 N or 9 8 L

9 9 N or 9 9 L


October

10 6 N or 10 6 L

10 7 N or 10 7 L

10 8 N or 10 8 L

10 9 N or 10 9 L


November

11 6 N or 11 6 L

11 7 N or 11 7 L

11 8 N or 11 8 L

11 9 N or 11 9 L


December

12 6 N or 12 6 L

12 7 N or 12 7 L

12 8 N or 12 8 L

12 9 N or 12 9 L




Year/Month

1920

1921

Notes


January

1 20 N or 20 1 L

1 21 N or 21 1 L

**The "N" or "L" will have a number next to the plant letter code


February

2 20 N or 2 20 L

2 21 N or 2 21 L

**The "N" or "L" will have a number next to the plant letter code


March

3 20 N or 3 20 L

3 21 N or 3 21 L

**The "N" or "L" will have a number next to the plant letter code


April

4 20 N or 4 20 L

4 21 N or 4 21 L

**The "N" or "L" will have a number next to the plant letter code


May

5 20 N or 5 20 L

5 21 N or 5 21 L

**The "N" or "L" will have a number next to the plant letter code


June

6 20 N or 6 20 L

6 21 N or 6 21 L

**The "N" or "L" will have a number next to the plant letter code


July

7 20 N or 7 20 L

7 21 N or 7 21 L

**The "N" or "L" will have a number next to the plant letter code


August

8 20 N or 8 20 L

8 21 N or 8 21 L

**The "N" or "L" will have a number next to the plant letter code


September

9 20 N or 9 20 L

9 21 N or 9 21 L

**The "N" or "L" will have a number next to the plant letter code


October

10 20 N or 10 20 L

10 21 N or 10 21 L

**The "N" or "L" will have a number next to the plant letter code


November

11 20 N or 11 20 L

11 21 N or 11 21 L

**The "N" or "L" will have a number next to the plant letter code


December

12 20 N or 12 20 L

12 21 N or 12 21 L

**The "N" or "L" will have a number next to the plant letter code




Year/Month

1922

1923

1924

1925

1926


January

A 2 N or A 2 L

A 3 N or A 3 L

A 4 N or A 4 L

A 5 N or A 5 L

A 6 N or A 6 L


February

B 2 N or B 2 L

B 3 N or B 3 L

B 4 N or B 4 L

B 5 N or B 5 L

B 6 N or B 6 L


March

C 2 N or C 2 L

C 3 N or C 3 L

C 4 N or C 4 L

C 5 N or C 5 L

C 6 N or C 6 L


April

D 2 N or D 2 L

D 3 N or D 3 L

D 4 N or D 4 L

D 5 N or D 5 L

D 6 N or D 6 L


May

E 2 N or E 2 L

E 3 N or E 3 L

E 4 N or E 4 L

E 5 N or E 5 L

E 6 N or E 6 L


June

F 2 N or F 2 L

F 3 N or F 3 L

F 4 N or F 4 L

F 5 N or F 5 L

F 6 N or F 6 L


July

G 2 N or G 2 L

G 3 N or G 3 L

G 4 N or G 4 L

G 5 N or G 5 L

G 6 N or G 6 L


August

H 2 N or H 2 L

H 3 N or H 3 L

H 4 N or H 4 L

H 5 N or H 5 L

H 6 N or H 6 L


September

I 2 N or I 2 L

I 3 N or I 3 L

I 4 N or I 4 L

I 5 N or I 5 L

I 6 N or I 6 L


October

J 2 N or J 2 L

J 3 N or J 3 L

J 4 N or J 4 L

J 5 N or J 5 L

J 6 N or J 6 L


November

K 2 N or K 2 L

K 3 N or K 3 L

K 4 N or K 4 L

K 5 N or K 5 L

K 6 N or K 6 L


December

L 2 N or L 2 L

L 3 N or L 3 L

L 4 N or L 4 L

L 5 N or L 5 L

L 6 N or L 6 L




Year/Month

1927

1928

1929


January

A 7 N or A 7 L

A 8 N or A 8 L

A 9 N or A 9 L


February

B 7 N or B 7 L

B 8 N or B 8 L

B 9 N or B 9 L


March

C 7 N or C 7 L

C 8 N or C 8 L

C 9 N or C 9 L


April

D 7 N or D 7 L

D 8 N or D 8 L

D 9 N or D 9 L


May

E 7 N or E 7 L

E 8 N or E 8 L

E 9 N or E 9 L


June

F 7 N or F 7 L

F 8 N or F 8 L

F 9 N or F 9 L


July

G 7 N or G 7 L

G 8 N or G 8 L

G 9 N or G 9 L


August

H 7 N or H 7 L

H 8 N or H 8 L

H 9 N or H 9 L


September

I 7 N or I 7 L

I 8 N or I 8 L

I 9 N or I 9 L


October

J 7 N or J 7 L

J 8 N or J 8 L

J 9 N or J 9 L


November

K 7 N or K 7 L

K 8 N or K 8 L

K 9 N or K 9 L


December

L 7 N or L 7 L

L 8 N or L 8 L

L 9 N or L 9 L




Year/Month

1930

1931

1932

1933

1934


January

A 30 N or A 30 L

A 31 N or A 31 L

A 32 N or A 32 L

A 33 N or A 33 L

A 34 N or A 34 L


February

B 30 N or B 30 L

B 31 N or B 31 L

B 32 N or B 32 L

B 33 N or B 33 L

B 34 N or B 34 L


March

C 30 N or C 30 L

C 31 N or C 31 L

C 32 N or C 32 L

C 33 N or C 33 L

C 34 N or C 34 L


April

D 30 N or D 30 L

D 31 N or D 31 L

D 32 N or D 32 L

D 33 N or D 33 L

D 34 N or D 34 L


May

E 30 N or E 30 L

E 31 N or E 31 L

E 32 N or E 32 L

E 33 N or E 33 L

E 34 N or E 34 L


June

F 30 N or F 30 L

F 31 N or F 31 L

F 32 N or F 32 L

F 33 N or F 33 L

F 34 N or F 34 L


July

G 30 N or G 30 L

G 31 N or G 31 L

G 32 N or G 32 L

G 33 N or G 33 L

G 34 N or G 34 L


August

H 30 N or H 30 L

H 31 N or H 31 L

H 32 N or H 32 L

H 33 N or H 33 L

H 34 N or H 34 L


September

I 30 N or I 30 L

I 31 N or I 31 L

I 32 N or I 32 L

I 33 N or I 33 L

I 34 N or I 34 L


October

J 30 N or J 30 L

J 31 N or J 31 L

J 32 N or J 32 L

J 33 N or J 33 L

J 34 N or J 34 L


November

K 30 N or K 30 L

K 31 N or K 31 L

K 32 N or K 32 L

K 33 N or K 33 L

K 34 N or K 34 L


December

L 30 N or L 30 L

L 31 N or L 31 L

L 32 N or L 32 L

L 33 N or L 33 L

L 34 N or L 34 L




Year/Month

1935

1936

1937

1938

1939


January

A 35 N or A 35 L

A 36 N or A 36 L

A 37 N or A 37 L

A 38 N or A 38 L

A 39 N or A 39 L


February

B 35 N or B 35 L

B 36 N or B 36 L

B 37 N or B 37 L

B 38 N or B 38 L

B 39 N or B 39 L


March

C 35 N or C 35 L

C 36 N or C 36 L

C 37 N or C 37 L

C 38 N or C 38 L

C 39 N or C 39 L


April

D 35 N or D 35 L

D 36 N or D 36 L

D 37 N or D 37 L

D 38 N or D 38 L

D 39 N or D 39 L


May

E 35 N or E 35 L

E 36 N or E 36 L

E 37 N or E 37 L

E 38 N or E 38 L

E 39 N or E 39 L


June

F 35 N or F 35 L

F 36 N or F 36 L

F 37 N or F 37 L

F 38 N or F 38 L

F 39 N or F 39 L


July

G 35 N or G 35 L

G 36 N or G 36 L

G 37 N or G 37 L

G 38 N or G 38 L

G 39 N or G 39 L


August

H 35 N or H 35 L

H 36 N or H 36 L

H 37 N or H 37 L

H 38 N or H 38 L

H 39 N or H 39 L


September

I 35 N or I 35 L

I 36 N or I 36 L

I 37 N or I 37 L

I 38 N or I 38 L

I 39 N or I 39 L


October

J 35 N or J 35 L

J 36 N or J 36 L

J 37 N or J 37 L

J 38 N or J 38 L

J 39 N or J 39 L


November

K 35 N or K 35 L

K 36 N or K 36 L

K 37 N or K 37 L

K 38 N or K 38 L

K 39 N or K 39 L


December

L 35 N or L 35 L

L 36 N or L 36 L

L 37 N or L 37 L

L 38 N or L 38 L

L 39 N or L 39 L




Year/Month

1940

1941

1942

1943

1944


January

A 40 N or A 40 L

A 41 N or A 41 L

A 42 N or A 42 L

A 43 N or A 43 L

A 44 N or A 44 L


February

B 40 N or B 40 L

B 41 N or B 41 L

B 42 N or B 42 L

B 43 N or B 43 L

B 44 N or B 44 L


March

C 40 N or C 40 L

C 41 N or C 41 L

C 42 N or C 42 L

C 43 N or C 43 L

C 44 N or C 44 L


April

D 40 N or D 40 L

D 41 N or D 41 L

D 42 N or D 42 L

D 43 N or D 43 L

D 44 N or D 44 L


May

E 40 N or E 40 L

E 41 N or E 41 L

E 42 N or E 42 L

E 43 N or E 43 L

E 44 N or E 44 L


June

F 40 N or F 40 L

F 41 N or F 41 L

F 42 N or F 42 L

F 43 N or F 43 L

F 44 N or F 44 L


July

G 40 N or G 40 L

G 41 N or G 41 L

G 42 N or G 42 L

G 43 N or G 43 L

G 44 N or G 44 L


August

H 40 N or H 40 L

H 41 N or H 41 L

H 42 N or H 42 L

H 43 N or H 43 L

H 44 N or H 44 L


September

I 40 N or I 40 L

I 41 N or I 41 L

I 42 N or I 42 L

I 43 N or I 43 L

I 44 N or I 44 L


October

J 40 N or J 40 L

J 41 N or J 41 L

J 42 N or J 42 L

J 43 N or J 43 L

J 44 N or J 44 L


November

K 40 N or K 40 L

K 41 N or K 41 L

K 42 N or K 42 L

K 43 N or K 43 L

K 44 N or K 44 L


December

L 40 N or L 40 L

L 41 N or L 41 L

L 42 N or L 42 L

L 43 N or L 43 L

L 44 N or L 44 L




Year/Month

1945

1946

1947

1948

1949


January

A 45 N or A 45 L

A 46 N or A 46 L

A 47 N or A 47 L

A 48 N or A 48 L

A 49 N or A 49 L


February

B 45 N or B 45 L

B 46 N or B 46 L

B 47 N or B 47 L

B 48 N or B 48 L

B 49 N or B 49 L


March

C 45 N or C 45 L

C 46 N or C 46 L

C 47 N or C 47 L

C 48 N or C 48 L

C 49 N or C 49 L


April

D 45 N or D 45 L

D 46 N or D 46 L

D 47 N or D 47 L

D 48 N or D 48 L

D 49 N or D 49 L


May

E 45 N or E 45 L

E 46 N or E 46 L

E 47 N or E 47 L

E 48 N or E 48 L

E 49 N or E 49 L


June

F 45 N or F 45 L

F 46 N or F 46 L

F 47 N or F 47 L

F 48 N or F 48 L

F 49 N or F 49 L


July

G 45 N or G 45 L

G 46 N or G 46 L

G 47 N or G 47 L

G 48 N or G 48 L

G 49 N or G 49 L


August

H 45 N or H 45 L

H 46 N or H 46 L

H 47 N or H 47 L

H 48 N or H 48 L

H 49 N or H 49 L


September

I 45 N or I 45 L

I 46 N or I 46 L

I 47 N or I 47 L

I 48 N or I 48 L

I 49 N or I 49 L


October

J 45 N or J 45 L

J 46 N or J 46 L

J 47 N or J 47 L

J 48 N or J 48 L

J 49 N or J 49 L


November

K 45 N or K 45 L

K 46 N or K 46 L

K 47 N or K 47 L

K 48 N or K 48 L

K 49 N or K 49 L


December

L 45 N or L 45 L

L 46 N or L 46 L

L 47 N or L 47 L

L 48 N or L 48 L

L 49 N or L 49 L




Year/Month

1950

1951

1952

1953

1954


January

A 50 N or A 50 L

A 51 N or A 51 L

A 52 N or A 52 L

A 53 N or A 53 L

A 54 N or A 54 L


February

B 50 N or B 50 L

B 51 N or B 51 L

B 52 N or B 52 L

B 53 N or B 53 L

B 54 N or B 54 L


March

C 50 N or C 50 L

C 51 N or C 51 L

C 52 N or C 52 L

C 53 N or C 53 L

C 54 N or C 54 L


April

D 50 N or D 50 L

D 51 N or D 51 L

D 52 N or D 52 L

D 53 N or D 53 L

D 54 N or D 54 L


May

E 50 N or E 50 L

E 51 N or E 51 L

E 52 N or E 52 L

E 53 N or E 53 L

E 54 N or E 54 L


June

F 50 N or F 50 L

F 51 N or F 51 L

F 52 N or F 52 L

F 53 N or F 53 L

F 54 N or F 54 L


July

G 50 N or G 50 L

G 51 N or G 51 L

G 52 N or G 52 L

G 53 N or G 53 L

G 54 N or G 54 L


August

H 50 N or H 50 L

H 51 N or H 51 L

H 52 N or H 52 L

H 53 N or H 53 L

H 54 N or H 54 L


September

I 50 N or I 50 L

I 51 N or I 51 L

I 52 N or I 52 L

I 53 N or I 53 L

I 54 N or I 54 L


October

J 50 N or J 50 L

J 51 N or J 51 L

J 52 N or J 52 L

J 53 N or J 53 L

J 54 N or J 54 L


November

K 50 N or K 50 L

K 51 N or K 51 L

K 52 N or K 52 L

K 53 N or K 53 L

K 54 N or K 54 L


December

L 50 N or L 50 L

L 51 N or L 51 L

L 52 N or L 52 L

L 53 N or L 53 L

L 54 N or L 54 L




Year/Month

1955

1956

1957

1958

1959


January

A 55 N or A 55 L

A 56 N or A 56 L

A 57 N or A 57 L

A 58 N or A 58 L

A 59 N or A 59 L


February

B 55 N or B 55 L

B 56 N or B 56 L

B 57 N or B 57 L

B 58 N or B 58 L

B 59 N or B 59 L


March

C 55 N or C 55 L

C 56 N or C 56 L

C 57 N or C 57 L

C 58 N or C 58 L

C 59 N or C 59 L


April

D 55 N or D 55 L

D 56 N or D 56 L

D 57 N or D 57 L

D 58 N or D 58 L

D 59 N or D 59 L


May

E 55 N or E 55 L

E 56 N or E 56 L

E 57 N or E 57 L

E 58 N or E 58 L

E 59 N or E 59 L


June

F 55 N or F 55 L

F 56 N or F 56 L

F 57 N or F 57 L

F 58 N or F 58 L

F 59 N or F 59 L


July

G 55 N or G 55 L

G 56 N or G 56 L

G 57 N or G 57 L

G 58 N or G 58 L

G 59 N or G 59 L


August

H 55 N or H 55 L

H 56 N or H 56 L

H 57 N or H 57 L

H 58 N or H 58 L

H 59 N or H 59 L


September

I 55 N or I 55 L

I 56 N or I 56 L

I 57 N or I 57 L

I 58 N or I 58 L

I 59 N or I 59 L


October

J 55 N or J 55 L

J 56 N or J 56 L

J 57 N or J 57 L

J 58 N or J 58 L

J 59 N or J 59 L


November

K 55 N or K 55 L

K 56 N or K 56 L

K 57 N or K 57 L

K 58 N or K 58 L

K 59 N or K 59 L


December

L 55 N or L 55 L

L 56 N or L 56 L

L 57 N or L 57 L

L 58 N or L 58 L

L 59 N or L 59 L




Year/Month

1960


January

A 60 N or A 60 L


February

B 60 N or B 60 L


March

C 60 N or C 60 L


April

D 60 N or D 60 L


May

E 60 N or E 60 L


June

F 60 N or F 60 L


July

G 60 N or G 60 L


August

H 60 N or H 60 L


September

I 60 N or I 60 L


October

J 60 N or J 60 L


November

K 60 N or K 60 L


December

L 60 N or L 60 L




Year/Month

1960

1961

1962

1963

1964

1965

1966

1967

1968

1969


January

A A

B A

C A

D A

E A

F A

G A

H A

I A

J A


February

A B

B B

C B

D B

E B

F B

G B

H B

I B

J B


March

A C

B C

C C

D C

E C

F C

G C

H C

I C

J C


April

A D

B D

C D

D D

E D

F D

G D

H D

I D

J D


May

A E

B E

C E

D E

E E

F E

G E

H E

I E

J E


June

A F

B F

C F

D F

E F

F F

G F

H F

I F

J F


July

A G

B G

C G

D G

E G

F G

G G

H G

I G

J G


August

A H

B H

C H

D H

E H

F H

G H

H H

I H

J H


September

A I

B I

C I

D I

E I

F I

G I

H I

I I

J I


October

A J

B J

C J

D J

E J

F J

G J

H J

I J

J J


November

A K

B K

C K

D K

E K

F K

G K

H K

I K

J K


December

A L

B L

C L

D L

E L

F L

G L

H L

I L

J L




Year/Month

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979


January

K A

L A

M A

N A

O A

P A

Q A

R A

S A

T A


February

K B

L B

M B

N B

O B

P B

Q B

R B

S B

T B


March

K C

L C

M C

N C

O C

P C

Q C

R C

S C

T C


April

K D

L D

M D

N D

O D

P D

Q D

R D

S D

T D


May

K E

L E

M E

N E

O E

P E

Q E

R E

S E

T E


June

K F

L F

M F

N F

O F

P F

Q F

R F

S F

T F


July

K G

L G

M G

N G

O G

P G

Q G

R G

S G

T G


August

K H

L H

M H

N H

O H

P H

Q H

R H

S H

T H


September

K I

L I

M I

N I

O I

P I

Q I

R I

S I

T I


October

K J

L J

M J

N J

O J

P J

Q J

R J

S J

T J


November

K K

L K

M K

N K

O K

P K

Q K

R K

S K

T K


December

K L

L L

M L

N L

O L

P L

Q L

R L

S L

T L




Year/Month

1980

1981

1982

1983

1984

1985


January

U A

V A

W A

X A

Y A

Z A


February

U B

V B

W B

X B

Y B

Z B


March

U C

V C

W C

X C

Y C

Z C


April

U D

V D

W D

X D

Y D

Z D


May

U E

V E

W E

X E

Y E

Z E


June

U F

V F

W F

X F

Y F

Z F


July

U G

V G

W G

X G

Y G

Z G


August

U H

V H

W H

X H

Y H

Z H


September

U I

V I

W I

X I

Y I

Z I


October

U J

V J

W J

X J

Y J

Z J


November

U K

V K

W K

X K

Y K

Z K


December

U L

V L

W L

X L

Y L

Z L




Year/Month

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995


JanuaryMarch

A A A

B B A

C C A

D D A

E E A

F F A

G G A

H H A

I I A

J J A


AprilJune

A A B

B B B

C C B

D D B

E E B

F F B

G G B

H H B

I I B

J J B


JulySeptember

A A C

B B C

C C C

D D C

E E C

F F C

G G C

H H C

I I C

J J C


OctoberDecember

A A D

B B D

C C D

D D D

E E D

F F D

G G D

H H D

I I D

J J D




Year/Month

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005


JanuaryMarch

K K A

L L A

M M A

N N A

O O A

P P A

Q Q A

R R A

S S A

T T A


AprilJune

K K B

L L B

M M B

N N B

O O B

P P B

Q Q B

R R B

S S B

T T B


JulySeptember

K K C

L L C

M M C

N N C

O O C

P P C

Q Q C

R R C

S S C

T T C


OctoberDecember

K K D

L L D

M M D

N N D

O O D

P P D

Q Q D

R R D

S S D

T T D


Notes: Date code may or may not contain a (dash). 