- Base
- Black
- Code On Tube
- f32 B4G
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn, B - Mullard, Blackburn
- Glass Color
- Clear Glass
- Mica
- Double
- Permanentid
- evi4mjma
- Pin Color
- Silver
- Plate Color
- Matte Gray
- Plate Look
- Sawtooth
- Tip Shape
- Pinched Tip
- Year
- 1964
