GEC 1971 HAMMERSMITH MANUFACTURE 12E1  5B/351D CV345 CV8025 NEW BOXED - MULLARD MAGIC - 1
GEC 1971 HAMMERSMITH MANUFACTURE 12E1  5B/351D CV345 CV8025 NEW BOXED - MULLARD MAGIC - 2
GEC 1971 HAMMERSMITH MANUFACTURE 12E1  5B/351D CV345 CV8025 NEW BOXED - MULLARD MAGIC - 3
GEC 1971 HAMMERSMITH MANUFACTURE 12E1  5B/351D CV345 CV8025 NEW BOXED - MULLARD MAGIC - 4

12E1 GEC 1971 HAMMERSMITH MANUFACTURE 5B/351D CV345 CV8025 NEW BOXED

£55.00
It's hard to find GEC variants of these lovely beam tetrodes.  This NOS example in it's blue GEC box dates from 1971 and is Hammersmith manufactured.