This is one pair of Sylvania 7F7 tubes. 7F7 is the Locktal equivalent of 6SL7.They are identical, with Grey cylindrical plates. These might be NOS, as they are in period correct boxes, however I am selling them as used. They have been tested on a calibrated Hickok 600A tester. Where each triode section is expected to read 1,300, one read 1,300/1,250. The other read 1,300/1,350. Priority shipping is $8.00. Paypal preferred.
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