These vintage NOS ("New Old Stock") tubes, Soviet 6L6GC/6n3CE Small Base, are Russian designator (6n3CE, 6P3SE) and are directly equivalent to 6L6GC/5881 from NOS Russian Military stock featuring a "coin" or small base.
The 6L6GC/6n3CE Small Base tube has a smooth, vintage, punchy tone that is pleasing to both hi-fi and guitar tone connoisseurs.
Packaged in a generic brown box.