An underline on your dial stands for Tritium!

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  1. philippstahl
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    @ 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...
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    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:
    image

    @ 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:
    image

    radiation measured from difference sites...
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12 replies since 8/2/2009, 17:01   629 views
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