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philippstahl.
User deleted
@ Roberto,
Your dial is from '63, has a underline that says that there is no radium but tritium used on the dial... imho no exception
This is more an exception i give you to think about ;- )
7922 big crown with gilt swiss underline silver text...
Another question that came up, does T mean that tritium is used?
Here a close up from a 6200 small logo with SWISS T print:
@ Claudio
We have tried the radium 6542 dials only, as also other references like 6202 6536 5508 etc..
All dials with radium are at least 50-100 times higher in radiation then tritium dials...
You also see it in blacklight:
radiation measured from difference sites...
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