RCA 6SL7GT - gray glass, bottom getter

This RCA 6SL7GT tube has black plates and a bottom D getter. Tube tests good and comes in its original box.

The late-1950s RCA 6SL7GT tubes in this precisely matched pair have gray glass and bottom getters. Both tubes test as new with balanced sections. They are matched for both current draw (mA) and transconductance (Gm).