Here is a vintage Philips Sylvania 6SL7 GT vacuum preamp tube that is in good clean condition with faded labeling, see pics for condition, testing and all that is included. This is a vintage USA made by Philips Sylvania tube that tested good in the green at 87/80, minimum good is 70 and max is 130. It has gray plates and a top round getter. Guaranteed good! It will be packaged for safe shipping. See my other items, vintage tube, guitar parts and more. Shipping is done by USPS. Multiple auctions won will receive a discount when combined, the more you buy the more you save. For multiple items, click REQUEST TOTAL FROM SELLER after Buy It Now to receive an invoice. Ebay automatically adds state sales tax. No refunds or returns on any item shipped International or Overseas.

RARE Electrically and physically Matched pair of NOS JAN Philips ECG 5691/6SL7GT Vacuum Tubes with matching manufacturing date codes made in USA. Electrically tested using a calibrated Sencore MU150 Continental II Vacuum Tube tester. These tubes test AS-NEW and have never been used. Due to the nature of vintage vacuum tube electronics, these tubes are being sold for parts AS-IS and will be properly packed for shipping. Please check my extensive feedback rating for confidence.