Round Tip
- Base
- Black
- Bottle Height
- Half
- Code On Tube
- f32 B4B2
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn, B - Mullard, Blackburn, B - Mullard, Blackburn
- Getter
- O-O Double Getter
- Glass Color
- Clear Glass
- Mica
- Double
- Permanentid
- aecew6gs
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Tip Shape
- Round Tip
- Year
- 1964
