3 US-Made 6S8 6S8GT Vacuum Tubes Valves NOS NIB Lot Of Three Type Grid Cap Tube Two lacks most markings

Tube Two lacks most markings and I believe it was military surplus and had its markings removed as memories of the war were a little too fresh

Tube Four (triode): 41

It measured 25/23 where minimum (65%) is 18/18 and 100% is 28/28

This new old stock-testing Sylvania 12AV7 dual triode was tested on our Jackson for shorts

though this headphone amp is not optimized for this tube type

3 US-Made 6S8 6S8GT Vacuum Tubes Valves NOS NIB Lot Of Three Type Grid Cap Tube Two lacks most markingsThese three new old stock, new in box US made 6S8GT tubes tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS