Question on UV/Black Light test

[116710er]

So I decided to do a UV/Black Light test on a 40+ year old Sub. I've never done this on such an old dial and I was expect it to light up like my early 90's sub but the plots/hands seem completely dead. They don't glow or "glisten" under UV but rather show up as as pale white/greenish color under UV light (but it looks "flat"). Is this normal? My early 90's sub "glistens" when I hit it with UV. I'm assuming this is because even though it's dead to my eyes, it's actually still has some life (so something like NVG's might be able to pick it up).

Under a 10x loupe with UV, I can see a couple of specks here of there of brilliant neon orange on the 40+ year old dial.