Colnect-3669-219-Dam-Madden-of-Panama-canal-overprint.jpg
Source: Colnect
Issued by: Panama
Function: postage
Date: 3/1/1937
Issue: 1937b
Denom: 50c
Overprint: U//P//U
Ovpt color: black
On: 12/1936 50c issue=4th Spanish-American Postal Congress
Color: orange
Design: "Resolute" (Liner) in Gaillard Cu
Watermark: unwmk
Perf: 12
Catalog value:



External links:
Colnect 656589..Congress_Issue