Watchmaker - I wish I would have read your comment earlier lol. I did in fact ruin the second hand with the tools. After ordering a new set of hands, the watch has been working perfectly! I love it and wear it daily.
This link goes a bit into the discoloration of glass by radiation and apparently is known as 'radiation browning'
The clock I saw it on had not worked for decades, had heavy radium paint on the hands and the hands had stayed in the same place over that time causing the discoloration of the glass inline with the hands.
I agree the yellow is age and its not glass it's plastic, its the blackening above the hands I'm talking about.
I only mentioned glass as the only other time I've seen this was on the glass of a clock with radium hands.
I also agree owning it wouldn't be dangerous, and if you are careful with cleaning it would be safe to work on this watch, but I'm going to pass on this watch as the evidence points to it having more radium paint on it than usual.
I finally got round to fitting a “proper” balance and it works great! I was a little worried at first as the timegrapher was showing snow, but managed to regulate it to at one point 2s/d and BE of 0.1 - so well happy The moral of the story if don’t be tight and get cheaper OEM parts.... Thanks for all your input Regards Carl Sent from my iPhone using Tapatalk
"I was told it will smoke when powered up"
It sounds like someone has already let the Magic Smoke come out. You know, of course, that it won't work without it, and getting it back in is pretty tough :-)