No. 4086-A - SELECTOR SET
Forms part of the telephone equipment at Controllers Stations.
Weight - 4lb. (1.8 kg.) Dimensions - 8in. x 7in. x 3in. (22cm x 19cm x 9cm.) Taken from:- STC Catalogue for Railway Systems Apparatus, D/DT. 17D1, Edition 1 (1957)
STC TELEPHONE No. 4086-A
Forms
part of the telephone equipment at Controllers Stations.