Heat by Mullard ECC83 12AX7 F91- Code On Tube
- F92 B8C
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn, B - Mullard, Blackburn
- Getter
- O-Getter Halo
- Getter Support
- One
- Glass Color
- Clear Glass
- Mica
- Double
- Permanentid
- kinndw8r
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Plate Look
- Ribbed / Scale
Branded
Branded
