True NOS NIB Date & Ip Matched Quad (4) Brimar 6L6G/CV1947 FK Codes Vacuum Tubes

Tube Type / Number: 6L6G/CV1947
Actual Brand*: Brimar
Printed Brand: Brimar
Quantity: 4 Pieces-Matched Quad
Matching Date Codes? Yes
Plate Construction: Black 
Getter Construction: Bottom []
Country of Manufacture: England
Visible Date Codes: FK
Lettering Condition: 100 Percent
Number of Mica Spacers: 2
Mica Spacer Shape: Saw
Glass Coating: Black Smoked-Full
Engraved Base? No
Boxes (always included): All Original
Notes: 

Testing: We have multiple quads of these so we are not listing the exact test data as each quad is slightly different. These quads were tested on a Max-Matcher tube tester at real world voltages and were tested and matched at or above NOS values for by Plate Current and Gm. These will test within 10% or less of each other. 

** 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.