RARE NOS NIB Philips CV717 / 5R4G Brown Base Vacuum Tube Valve European

Tube Type / Number: CV717 [5R4G]
Actual Brand*: Philips
Printed Brand: Zaerix
Quantity: 1 Pieces - Single
Matching Date Codes? 
Plate Construction: Long Gray
Getter Construction: 2 Bottom Foil O
Country of Manufacture: Europe (most likely Denmark but there are no date codes) We know these are European because they have the classic stretched out ST bottle only found with Euro tubes
Visible Date Codes: 
Lettering Condition: 100 Percent
Number of Mica Spacers: 2
Mica Spacer Shape: O
Glass Coating: None
Engraved Base? No
Boxes (always included): 1 Box - Original
Notes: 

Testing: We have multiples of these in stock and therefore are not listing the test results here. All of these have been tested and or matched on a calibrated Hickok TV-7 tube tester.

Don't miss out - these are some of the warmest rectifiers you can get your hands and they won't last long!

** 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.