Wireless World, November 30, 1934.

Valves Advertised:

H210, D210, DDT220, L210, P220, PP220, PX230, Y220, Z220, B230, DB240, QP240, SG215, SG220, VS215, HP215, VP215, AC/HL, AC/DDT, AC/L, AC/Y, AC/Z, AS/SL, AC/SH, AC/VS, AC/VH, AC/HP, AV/VP, UU120/350 & UU120/500.