StampData
Stamp catalog
Collections
Lists
Joint Issues
Sheets
Notes
Albums
Catalogs
Things
Tools
Statistics
Quiz
Login
Source:
Colnect
Issued by:
Nicaragua
Function:
postage
Date:
5/15
/
1971
Issue:
Physical Laws and Mathematical Formulas
Denom:
20c
Color:
multicolored
Design:
Albert Einstein
(1971 Nicaragua)
Watermark:
unwmk
Perf:
Catalog value:
Prev:
15c d=Isaac Newton (1971)
Next:
25c d=J. Napier
External links:
Colnect 533764..ry-Mathematics
Record of changes
