TUNG-SOL 6550 QUAD NOS tubes, matched, genuine USA I960 year.usedTUNG-SOL 6550 QUAD NOS  tubes, matched, genuine USA I960 year.  black flat plates, ORIGINAL, 1960, PERFECTFor sale four very rare 6550 tubes , Tung-Sol brand , made in USA. The tubes are pristine , NOS, the original boxes opened first time by me just for checking. These are the early version , with bla...950.00

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TUNG-SOL 6550 QUAD NOS tubes, matched, genuine USA I960 year. black flat plates, ORIGINAL, 1960, PERFECT [Expired]


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For sale four very rare 6550 tubes , Tung-Sol brand , made in USA. The tubes are pristine , NOS, the original boxes opened first time by me just for checking. These are the early version , with black plates , no holes , and triple getter. All have similar factory codes 3226023-3, (year 1960) Visible are near mint .. Tested as matched quad on my HICKOK 752A tester 1-2% Please see carefully the photos are the actual items that will be sent I ship the items between 1-3 working days after payment via paypal, as registered parcel, (with tracking number) . Thanks for looking, Giannis..
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