Four (4) 6SN7GTB RCAvintage vacuum tubes, made in USA, 

all close date codes MA, MJ, NJ, NL, made in early 1960s,

tubes have black ribbed plates, clear top, bottom side rectangular getter, tubes tests: 

Price is for all tubes pictured.

We test all tubes we sell! We will combine shipping! Check out my other tubes!

Tubes are tested for emission, as well as for shorts, life test and grid leakage on calibrated Sencore Mighty Mite tube tester,

on scale 1-120, good quality on my Sencore starts at 70.