|This catalogue shows
that in mid-sixties, Mazda was pushing the "Big-M" logo, but
didn't apparently care what colour it was. Whilst black in the valve
boxes above, white was OK too.
A pure data book, avoiding prices by asking you to contact their
appropriate service depot. The intro states that a separate semiconductor
booklet is available on request - keeping those new fangled things very
much apart. Contents includes new
types of valves.
Thorn-AEI Radio Valves & Tubes Ltd
155 Charing Cross Road
Ref Nos. TAEI/M/2C and WPG. 40M 8/64