Homer Laughlin China Date Codes

1911 to 1960: In these date codes, the first set of character(s) represent the month, the second set the year and the third set identifies the plant in which the piece is made. For illustration purposes, all of the codes in the tables have "L" or "N" as the plant code.

There are other plant codes consisting of letters or a combination of letters and numbers. The month/year codes are as follows:
1911 to 1919:1 through 12 indicate January through December, followed by 1 through 9 for the last digit of the year from 1911-1919.

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
1920 to 1921: 1 through 12 again stand for the month, followed by "20" or "21" for 1920 and 1921.
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
1922 to 1929: The month indicators are changed to letters A through L for January through December. The years are represented by the numbers 2 through 9 for 1922-1929.
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
1930 to May 1960: A through L for January through December followed by the numbers 30 through 60 for the years 1930-1960.
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
1960 to 1985: The months are again shown by the letters A-L for January-December. The next letter(s) indicate the year, beginning with "A" for 1960 and ending with "Z" for 1985.
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
1986 to 2005: The first two letters indicate the year, beginning with "AA" for 1986 and continuing with double letters to "TT" for 2005. The last letter, A-D, shows the quarter of the year in which the piece was made.
Year/Month
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
January-March
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
April-June
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
July-September
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
October-December
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
January-March
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
April-June
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
July-September
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
October-December
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).