Wireless World, October, 1967.

Valves Advertised:

OA2, OA2WA, OB2, OB2WA, OC2, QS75/20, QS75/60, QS92/10, QS95/10, QS108/45, QS150/15, QS150/45, QS1202, QS1203 & QS1215.