Name | Issues/Designs | |||
![]() |
compass | — | — | d - Old compass 1992 |
![]() |
Cordless switchboard | — | — | d - Cordless switchboard & operators 1976 |
![]() |
message switching center | — | — | d - message s..ng center 1976 |
![]() |
microscope | — | — | d - microscope (1982) 1982 |
![]() |
microwave tower | — | — | d - microwave tower 1976 |
radio | — | — | - 100th Anniversary of ... | |
![]() |
telephone | 1876 | — | invention d - telephones 1976 |