POST OFFICE ENGINEERING DEPARTMENT — Technical Pamphlets for Workmen. [Group F]. [GOOD COLLECTION, WANTING TWO VOLUMES]. BRIGHT COLLECTION IN ORIGINAL WRAPPERS

HMSO, 1919-[1938]. 6 vols., [of 8], 8vo., with illustrations and diagrams in the text, numerous errata slips pasted in text as appropriate; original blue wrappers, wire-stitched as issued, covers lightly dust-soiled else a very good, clean collection. The collection comprises F2: Subscribers' Apparatus. CBS Part I; F3: Subscribers' Apparatus. Magneto; F4: Private Branch Exchanges, Common Battery System; F5: Private Branch Exchange, C.B. Multiple No. 9; F7: House Telephone Systems; F8: Wiring of Subscribers' Premises. This Group wants only F1: Subscribers' Apparatus CB; F6: Private Branch Exchange. Magneto. GROUP COLLECTIONS OF THIS NOTABLE AND HISTORIC SERIES ARE VERY SCARCE.