Are these radium dials?
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  1. #1
    iht
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    Are these radium dials?

    Do these watches contain radium? The one of the right hand side is allegedly from 1965. Thanks.


  2. #2
    Member Eeeb's Avatar
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    Re: Are these radium dials?

    Doesn't look like it to me. The one on the right probably has tritium... and no longer glows much. The one on the left ... does it have any lume at all?
    "Forever is composed of nows." - Emily Dickinson

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    ...that's just my opinion and I've been wrong before and will be again and might be now!

  3. #3
    iht
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    Re: Are these radium dials?

    Quote Originally Posted by Eeeb View Post
    Doesn't look like it to me. The one on the right probably has tritium... and no longer glows much. The one on the left ... does it have any lume at all?
    Thanks for your reply.

    How do you tell the difference between radium and tritium? I would have thought both would no longer be glowing after several decades?

    The one of the left doesn't appear to have any lume, from what I can see.

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    Re: Are these radium dials?

    Hi, the one on the left has zero illumination of any kind on the hands or dial.
    The one on the right has some small amount on the dial-dots at the hour marks, and on the hands.
    This could possibly be of a radioactive material, but not Tritium, as there are no "T" letters either side of the "Swiss made" at the bottom of the dial. All dials with Tritium will be marked with a capital T at the bottom, usually next to any existing marks.
    Last edited by bobbee; July 14th, 2014 at 10:29.
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    Member HOROLOGIST007's Avatar
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    Re: Are these radium dials?

    Quote Originally Posted by iht View Post
    Thanks for your reply.

    How do you tell the difference between radium and tritium? I would have thought both would no longer be glowing after several decades?

    The one of the left doesn't appear to have any lume, from what I can see.
    If Tritium.

    It will say T SWISS T
    OR
    T SWISS T < 25
    where T = Tritium.
    Tritium was introduced in 1960 to 1998.
    There after Luminova which is non radioactive

    Adam

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    iht
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    Re: Are these radium dials?

    Quote Originally Posted by HOROLOGIST007 View Post
    If Tritium.

    It will say T SWISS T
    OR
    T SWISS T < 25
    where T = Tritium.
    Tritium was introduced in 1960 to 1998.
    There after Luminova which is non radioactive

    Adam

    Adam
    Thank you. So does that mean the one on the right hand side is likely a radium dial? Even in 1965 by a brand like GP?
    Last edited by iht; July 14th, 2014 at 11:31.

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    Member HOROLOGIST007's Avatar
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    Re: Are these radium dials?

    I think not
    after Tritium -> Supernova
    OR if no radium they marked
    SWISS or SWISS MADE
    NEVER ARGUE WITH AN IDIOT. FIRST THEY WILL DRAG YOU DOWN TO THEIR LEVEL. THEN, THEY WILL BEAT YOU WITH EXPERIENCE.

    "Failure is not an option" - Gene Kranz
    "Owning a vintage watch is great, understanding where it sits in Horology is magnificent"
    and
    "By Teaching Others, We Teach Ourselves"
    Adam

  9. #8
    iht
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    Re: Are these radium dials?

    Quote Originally Posted by HOROLOGIST007 View Post
    I think not
    after Tritium -> Supernova
    OR if no radium they marked
    SWISS or SWISS MADE
    Sorry Adam, would you mind expanding on this? Not quite understanding the shorthand here, sorry

    So you think my watch does NOT have radium?

  10. #9
    pej
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    Re: Are these radium dials?

    Quote Originally Posted by iht View Post
    Thank you. So does that mean the one on the right hand side is likely a radium dial? Even in 1965 by a brand like GP?
    Not likely. '65 would be very late for a radium dial. After the introduction of Tritium, radium dials were discontinued pretty quickly. If you're worried, find someone with a geiger counter, a radium dial will get a significant reading, tritium won't.
    Last edited by pej; July 14th, 2014 at 11:36.

  11. #10
    iht
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    Re: Are these radium dials?

    Thanks for your reply. Sorry I'm just a bit confused. So my watch does NOT have the T marking, which would have indicated tritium. If that's the case, then what would the material be?

    Sorry if I'm slow in understanding you guys!

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