2 GE RCA 5691 Tubes 1950's / Black Plates Red Bases/ Amplitrex Tested 👍 /6SL7GT

Tested on Amplitrex computerized tube tester analyzer. Tested on Amplitrex tube tester where spec (nominal) values are 1600 micromhos / 2.3 mA. firm bases. 1950's manufacture dates. Black plates. Double DD double D's getter.

eBay