Polish Electrim Aster 72 Phone
1976
Croma Telephone
1976

GPO Deltaphone

1979

About This Phone

The Deltaphone was a later Trimphone variant.

Related PDFs

Talking Points
Talking Points
1970
 The Story of the Telephone
The Story of the Telephone
1970
 GPO Green Pages
GPO Green Pages
1972
 Telephone Companion
Telephone Companion
1973
 Telephones for Businesses
Telephones for Businesses
1976
 Telex With Teleprinter
Telex With Teleprinter
1978