SYLVANIA 12AT7 tube, tests strong, Red Font, D top getter

Note: the red font lettering is faint however can be seen in person as well as type number, it just doesn't capture well on the photos.

First photo you can see the faint 'SYVANIA' loogo in red.

Second photo you can see '12AT7' across/toward the top of tube.

Tested at 3950/4300 uM micromhos on a restored/calibrated Hickok 539B tube tester

the minimum "good" value is 2500 uM micromhos per section

Please note test values may differ slightly from tester to tester and not responsible if your tester reads it differently,

Values are added as a means to show the tubes indeed tests good, not an exact science. Your results can/may vary.