2 vintage Sylvania Zenith 6j5g tubes -tested- 6j5

2 vintage sylvania (1 labelled zenith 1 labelled philco) 6j5g tubes

st style glass envelopes
black plates - dimpledd foil getters
 

tested on my Amplitrex AT-1000 mutual conductance tube tester
(fixed bias)

no gas, no shorts or hk leakage

the minimum for this type is 1300 with average new being 2600

tested @
2800
2600

test results written in black marker on each tube