Tung-Sol JAN 6SL7WGT - ribbed gray plates, brown base

This 1960s Tung-Sol 6SL7GT tube has a tall bottle, ribbed gray plates, and a halo getter. The black base has white print with the Tung-Sol logo. Tube tests as new with balanced sections and low noise.

This rare 1963 Tung-Sol 6SL7GT tube has black plates, a D getter, and a triple mica. The brown base has black print with the Tung-Sol logo. Tube tests as new with low noise.