: ...and you might get an inkling as to why the lume has gone
: berserk. It's marked for radium, not tritium. Not really a
: health hazard except for anyone working on the dial - they would
: need to take a few common sense precautions. You'd have to be
: careful about getting a replacement radium dial too, you might
: come up against import restrictions.

: That said, I actually prefer the other version of the dial anyway.
: The text on the radium dial comes very close to fouling both the
: date window and a marker, on the dial on the left there is
: clearer separation.

...this right hand Favre Leuba has way more issues than the left one.

When I bought this watch years ago I wondered what the inscription "Ra<15uc" meant and a Swiss watch friend that introduced me into this brand explained it to me. This dial had no "tritium" but "radium" that was what was used before the arrival of tritium.
In the old days, people did not appreciate the risks of radioactive material as we do today and radium was used on watche dial up to 1960.
Conclusion, it's only problematic if you inhale or ingest radium, which as long as its behind glass, is really hard to impossible to do. Therefore to work on the dial would require some adequate extra precautions.

Thank you very much for your always priceless advices! Seems like the left hand watch is winning this race ;)

Wishing you a fun weekend,
Sandra - PASSION66