Colnect-4516-360-Telecommunications---Pulse-Code-Modulation.jpg
Source: Colnect
Issued by: Great Britain
Function: postage
Date: 10/1/1969
Denom: 1sh
Color: multicolored
Design type: post office technology
Design: diagram of pulse code modulation
Watermark: unwmk
Perf: 14x14.25
Catalog value:

In collections: mint (Stan Shebs), used (maureen)

External links:
Colnect 2193-T..rthern_Ireland


Record of changes