(4) 7591 Sylvania U.S.A. Sansui Fisher Output vacuum tube valve
This item are 4tubes7591A Sylvania Made in U.S.A. Test result 70-75 min 36. Grey plate, O-Getter, Coin base, no original box. Used tubes.
This item are 4tubes7591A Sylvania Made in U.S.A. Test result 70-75 min 36. Grey plate, O-Getter, Coin base, no original box. Used tubes.