Can a 1966 seamaster with original lume still glow for 20-30 minutes?
I have tried to research this and understand that the tritium itself is almost all gone, but that the
Phosphor paint used can still glow after exposure to uv light. But, could it still glow for longer than just a few seconds? Mine glowed faintly for 25 minutes.

This is watch in question. Thanks

 

Mine faintly glow for awhile, especially in pitch black.

 

I confirm, my Seamaster (1966) still glows after 30 minutes.
I let my eyes adjust to the darkness for three four minutes.

 

Hey thanks, nice looking watch

 

Mine glows to! Im guessing your watch has -64 engraved in the caseback? SN starting around 2.3?

 

-64 caseback, SN 2.2 consistant with type B bezel.
https://omegaforums.net/threads/seamaster-300-bezels.36357/

 

Ah Mine is similar but SN 2.3!