Marconi by Mullard ECC83 B339 F91- Code On Tube
- F91 B8I
- 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
- qn3t7zga
- Pin Color
- Silver
- Plate Color
- Matte Gray
- Plate Look
- Ribbed / Scale
