Tube identification challenge

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Hi everyone, wanting to see if I can get some wisdom on identifying this tube. It's supposed to be "made in holland" but I can't see the factory code. When I initially received it i faintly saw a something that resembled a delta code but those symbols and numbers rubbed off which is a first. The tube also has the 4 seams on top and it's has a M on the bottom of the tube.
Construction seems identical to another holland Amperex I have.
Another interesting thing, this tube does not flash at start up.
Any feedback is welcomed

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Topic - Tube identification challenge - edwardceja83@gmail.com 21:01:27 09/03/23 (3)

RE: Tube identification challenge - dericmc@live.com 13:10:32 10/21/23 (0)

RE: Tube identification challenge - edwardceja83@gmail.com 21:02:44 09/03/23 (1)

RE: Tube identification challenge - Mendel 18:16:06 09/28/23 (0)

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