Round Tip
- Base
- Black
- Bottle Height
- Tall Bottle
- Bottle Shape
- Coke Bottle
- Code On Tube
- R73 B4C2
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn, B - Mullard, Blackburn, B - Mullard, Blackburn
- Getter
- Bottom Getter
- Glass Color
- Clear Glass
- Mica
- Double
- Other Marks
- Is marked Made in Holland, but etched code on tube points to Blackburn Mullard factory., Is marked Made in Holland, but etched code on tube points to Blackburn Mullard factory., Is marked Made in Holland, but etched code on tube points to Blackburn Mullard factory.
- Permanentid
- yevn11v8
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Tip Shape
- Round Tip
- Year
- 1964
