. . . of a long time collector who owned over 2,000 watches when he died a few years ago. It likely was acquired a long time before?
Worn 14 hours per day x 365 x 15µSv/hr=76,650 µSv per annum; a very large accumulated dose of radiation. "100,000 μSv – Lowest yearly dose likely linked to increased cancer risk." "2,000,000 μSv – Severe radiation poisoning (sometimes fatal)."
You have been warned! - Clive