NOS NIB International USA 6KN8 / 6RHH8 [RARE Drop-In 6DJ8 6922 Sub] Vacuum Tube

Tube Type / Number: 6KN8 / 6RHH8 [RARE Drop-In 6DJ8 6922 Sub]
Actual Brand*: International
Printed Brand: International
Quantity of Tubes: Single
Plate Construction: Grey
Getter Construction: Top O
Country of Manufacture: USA
Visible Date Codes: 922-27
Lettering Condition: 90 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Saw
Smoked Glass? Clear
Engraved Base? No
Boxes Included? 1 Box - Original
Notes: Rare 6DJ8 Drop-In Substitute

Gm Test Results: 110/110
Minimum Good Value: 50/50
NOS Test Value: 100/100
Life Calculation: 100+% (where 65% = fail)

Tests as NOS?: Yes
True NOS?*: Yes

** Please note, many tubes will test NOS but will actually have a few hours of use on them. A truly NOS tube will have excellent getter flashing condition, no dirt/grime, usually in the original box, and no filament deposits. If a tube is listed  as "tests NOS" but is listed as "not True NOS" please expect the tube to have a small amount of use *

All tubes have been tested using only the best tube testers. We have a large fleet of tube testers, and every single one of them has been calibrated within the last year by industry experts. We mainly use the Hickok TV-7D/U, but occasionally we may use a Hickok 539, 533A, or 600A.