Mullard Magic: For All Your Vintage Valve and Radio Needs!
AN ORCHESTRA IN YOUR HAND, WALTER 505, CATALOGUE,
AVO, ELECTRICAL & ELECTRONIC MEASURING INSTRUMENTS, BROCHURE, 1963
AVO, MARK 8 UNIVERSAL, AVOMETER, WORKING INSTRUCTIONS, 1963
AVO, MULTIMINOR , MARK4, DATA SHEET, 1968
AVOMETER MODEL 8 UNIVERSAL ORIGINAL INSTRUCTION MANUAL & PROTECTIVE COVER 1950S