Earlier red label, non "A" tube.  

Tests 1425/1600 where 875 is pass in a calibrated Hickok 539-B.

Listening tested for excessive noise and microphonics in a Maxi-preamp 2 noise tester.

All tubes are guaranteed good or may be returned.  

Shipping includes insurance.

Please see our other items for more vintage tubes & audio.

We combine orders for shipping.

We do not change values for customs.  

Thank You.