This is a pair of metalbase 6V6GT-S (aka. 6P6P) “Summer-Of-69 Special” NOS tubes made in the year 1969, Premium Matched by Tube Amp Doctor.
NOTE: these tubes are selected NOS, means new (unused) old stock. They are 50 years old sleepers. Signs of age, such as faded colour of phenolic base or print markings, flash rust on metal parts or slightly opaque glass might occur.