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B36 Osram and Marconi brown base square getter 12SN7GT double triode code LK 4 and LM 4

B36 Marconi and Osram £ 150 pair.

B36 Osram brown base rare yellow paper logo BVA British Valve Association codes on glass MA 4 and LK 4

Osram B36 brown base yellow paper logo £ 275 pair.

B36 Osram double triode metal base cup getter code on glass GC 4 and HH 4

Osram B36 £ 350 pair.

B4 BTH BBC – R Marconi BBC – Radion Special Detector – Moorhead type B all top pip all ‘colour’ rare valves

B4 BBC BTH £ 250

R Marconi BBC £ 500

Radion Special £ 500

Moorhead type B £ 600

B65 Marconi red logo MO-V valve batch code FC FA 4 full getter E1606 13D2 6SN7GT ECC32 equivalent

B65 Marconi codes FA4 FC 4 £ 1300 pair

B65 Marconi Red logo MO-V valve batch code GG 4 GL 4 full getter E1606 13D2 6SN7GT ECC32 equivalent

Marconi red logo B65 £ 1450 pair

B65 Marconi Red logo MO-V valve batch same code FH 4 full getter E1606 13D2 6SN7GT ECC32 equivalent

Marconi B65 same code FH 4 £ 1500 pair

B65 MWT Marconi Wireless Telegraph cobalt round logo MO-V valve batch same code GC 4 full getter E1606 13D2 6SN7GT ECC32 equivalent

B65 Marconi Wireless Telegraph £ 1200 pair

B65 Osram Blue logo MO-V valve batch same code HB 4 full getter E1606 13D2 6SN7GT ECC32 equivalent

B65 Osram HB 4 £ 1400 Pair