TELEPHONE No. 90
Local battery set similar to Telephone No. 88 but without hand generator.
Used on C.B.S. circuits.
Known as a 'Corporation Set' as it is shaped like many similar phones supplied to the large municipalities of the day.
Fitted with Telephone No. 28 as the handset.
Mentioned in Diagram N188 (dated 1917).
Last revised: March 02, 2012