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Vintage Heuer Discussion Forum
The place for discussing 1930-1985 Heuer wristwatches, chronographs and dash-mounted timepieces. Online since May 2003. | |||||||
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Nice pairs Jeff!
Is the lume mix different on the hands than the hour markers? Seems to have aged differently on the latter pair.
The "T - 25 mc" marking is interesting too. Although I'd expect Ci instead of C, it looks like a rating in millicuries for the tritium. 25 mc would be 925 million becquerels or, more handily, 0.925 GBq, which means just under a billion radioactive decays per second. Factoring in a half life of 4500 days +/-8, that means that they would still be producing...errrmmm...uhhh...running out of fingers now.... lots of decays per second :)
I don't hold myself accountable for any of that maths by the way, it's still before 7 in the morning here!
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