Branded Mullard
Pinched Tip
- Base
- Black
- Bottle Height
- Tall Bottle
- Bottle Shape
- Skinny Bottle
- Code On Tube
- Xf3 B4B4
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn, B - Mullard, Blackburn
- Getter
- O-Getter Halo
- Glass Color
- Clear Glass
- Mica
- Double
- Permanentid
- srzr2x72
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Plate Look
- Stapled
- Tip Shape
- Pinched Tip
- Year
- 1964
