Rare Philips Miniwatt 6201 E81CC SQ Gold Pin.
Hamburg "Valvo" plant Df6 D5A4
Test 3600/4000 where 2650 is good in a calibrated Hickok 539-B tester.
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.
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