Colnect-135-964-Robert-von-Lieben-1873-1913-electrons-amplifier-tube.jpg
Source: Colnect
Issued by: Austria
Function: semipostal
Date: 12/6/1936
Denom: 60+60g
Color: violet blue
Design type: Austrian inventors
Design: Robert von Lieben
Watermark: unwmk
Perf: 12.5
Width: 33.00 Height: 33.00
Catalog value:



External links:
Colnect 17135-..tube-Inventors