1 x 12ax7 RCA Tube

Made in USA

Long Ribbed  Black plates

 D or slant getter

The lettering is smudged/worn

Pictures show actual
 
Tested on Enhanced Tripplet E3444 Laboratry Tester

1200/1010 micromhos @ .82 & .78 mA

Industry Bogey(100%) = 1600/1600 micromhos @ 1.2 & 1.2 mA

I do combine S&H when possible