Mike, thanks for the great article, myself being new to vintage watches found it highly informative. I came into a 1967, 5513, 1,73x,xxx ser.# a few month back, I have left it in the bright sun for an hour, brought it into to a dark room, but no glow. The other night the I had a LED flash light shining on it and got the green glow
, was very bright for about 2 minutes, and slowly faded.
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