Manufacturer: Schonwald
User: Egon Oldendorff
Date of cup and saucer: 1950-1968

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Notes:
Shipping company based in Hamburg, Germany founded in 1921 and continues to this day (2020).

White body with blue double stripes and house flag with blue field and EO in white.

Source: Brown's Flags and Funnels, Sixth Edition, Compiled by Philip L. Wedge

For additional info:
http://www.oldendorff.com/index.html

ID and photos contributed by reddygal