B33912AX7

Branded Marconi

B339, ECC83, I61

Branded G.E.C.

ECC83, B339, F91

Mullard

Branded Marconi

ECC83, B339, I61

Branded Marconi

ECC83, B339, I61

Mullard

Branded Marconi

B339, 12AX7

Branded Osram

12AX7, ECC83, B339, I63

Branded Marconi

12AX7, ECC83

Philips

Branded Hammond

12AX7

Sylvania

Branded Rad Tel

ECC83, 12AX7, I63

Branded Mullard

12AX7

Branded General Electric

12AX7

Branded NU

Z729, EF86

Branded Marconi

12AX7A, 7025A

Marconi

Branded Marconi

ECC83, B339, F91

Mullard

Branded Marconi

12AX7

Branded Marconi

ECC83, B339, I61

Branded Marconi

ECC83, 12AX7

Branded Marconi