One pair of early 6SN7GT tubes by Sylvania. The 6SN7WGT was also recorded on the tubes,

-GT preceded both -GTA and -GTB in production sequence.

Black channel plate, chrome top.

Test Ratings:  95/105 and 96/100  on my Jackson 648s tester, minimum is 70, new tubes at about 105.

SHIPPING: Shipping rates quoted are for USA and Canada only. Shipping rates to Europe and Asia are subject to slight variation. The buyer for those countries will be informed about the exact rate after the sale. 

Please pay in 3 days. Combined shipping is welcome. If you have paid for individual items and have surplus shipping fee paid for, I will refund you immediately when I send out the combined parcel.