Colnect-169-360-Pythagorean-Congress---Pythagorean-Theorem.jpg
Source: Colnect
Issued by: Greece
Function: postage
Date: 8/20/1955
Issue: Pythagorean school 2500th
Denom: 3.50d
Color: black & gray
Design: theorem illustration
Watermark: crowns
Perf:
Catalog value:



External links:
Colnect 60759-..rem-Congresses


Record of changes

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