Colnect-3201-588-E-H-Armstrong-1890-1854.jpg
Source: Colnect
Issued by: Czechoslovakia
Function: postage
Date: 12/7/1959
Denom: 2k
Color: multicolored
Design type: radio & telegraph inventors
Design: circuit diagram & Edwin Armstrong
Watermark: unwmk
Perf: 11.75x11.25
Catalog value:

In collections: used (Stan Shebs)

External links:
Colnect 134034..Radioinventors