TESTS BAD FOR DISPLAY ONLY VINTAGE Original GEC Genalex KT88 6550 Vacuum Tube

One original Genalex KT88. This tube has a vacuum leak and cracked glass. It's a bad tube sold for display or research purposes only. No returns or guarantees accepted. 

Tube Type / Number: KT88
Actual Brand*: Genalex / GEC
Printed Brand: Genalex Gold Lion
Quantity: 1 Piece-Single
Matching Date Codes? 
Plate Construction: Black
Getter Construction: 3 O getters
Country of Manufacture: England
Visible Date Codes: 
Lettering Condition: 20 Percent
Number of Mica Spacers: 3
Mica Spacer Shape: 
Glass Coating: 
Engraved Base? No
Boxes (always included): One generic white box
Notes: 

Tested on a Maxi-Matcher real world voltages

Test Results

Gm Test Result: WONT TEST / TESTS BAD

Plate Current Test Result: WONT TEST / TESTS BAD

Tests as NOS?: No
True NOS?*: No

** 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.