from the 'INSTITUTE of ELECTRICAL ENGINEERS' on 'THE B.B.C. SOUND BROADCASTING SERVICE ON VERY HIGH FREQUENCIES', dated 1957 and another for 'LOW-LEVEL MODULATION VISION TRANSMITTERS, WITH SPECIAL REFERENCE TO THE KIRK O'SHOTS AND WENVOE STATIONS', dated 1953
from the 'INSTITUTE of ELECTRICAL ENGINEERS' on 'THE B.B.C. SOUND BROADCASTING SERVICE ON VERY HIGH FREQUENCIES', dated 1957 and another for 'LOW-LEVEL MODULATION VISION TRANSMITTERS, WITH SPECIAL REFERENCE TO THE KIRK O'SHOTS AND WENVOE STATIONS', dated 1953
Auction: The Collectors Sale, 9th Aug, 2022