General Electric 12AX7 Engineering Samples- Brand Extended
- General Electric
- Getter
- Square Getter
- Getter Support
- One
- Glass Color
- Clear Glass
- Mica
- Double
- Other Marks
- These are Engineering Samples.
- Permanentid
- 653g4unx
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Tip Shape
- Pinched Tip
- Year
- 1947
