RCA 5692 is one of the USA made holy grail of 6SN7 tubes types! In stock and ready to ship. All red base RCA made. 3 pcs available at this time:
Broken Guide (2.4/2.2)
RCA made/branded GE (2.2/2.4)
1 available with Matched sections $10 extra (2.6/2.6)
All are red base made by RCA; One is branded GE in original GE box, the other 2 RCA in El Menco boxes.