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  • IWC - Cal 8541 & 8541B
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chevron_left Movements and technical details

IWC - Cal 8541 & 8541B

  • forum 2 replies
  • last reply by Greg Steer 15 Mar 2021
  • Last
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    Mr. Gary Corcoran
    Graduate 54 posts
    15 Mar 2021, 12:28 p.m. 15 Mar 2021, 12:28 p.m.
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    What is the difference with IWC - Cal 8541 & 8541B?

  • link
    Mark Fleminger
    Master 3201 posts
    15 Mar 2021, 3:52 p.m. 15 Mar 2021, 3:52 p.m.
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    Here are two excellent Cal 8541 resources

    Thank You to Cellar and others for these:

    www.gregsteer.net/IWC/Cal_85/Calibre8541Watches.htm

    and

    www.frizzellweb.com/larry/ingenieur/Ingenieur3.html

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    Greg Steer
    Master 2688 posts
    15 Mar 2021, 7:01 p.m. 15 Mar 2021, 7:01 p.m.
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    Hi Gary,

    The difference is the collet used, see;

    For you techies --about IWC collets...

    B" doesn't mean hacking
    (more)

    If you want to see how the hairsping attaches to the collet, see;

    Hairspring Week: Vibrating the
    Spring

    Hope this helps.

    Cheers from the cellar

    Anthony Sonego, Regnimelf3717 and gsc1ugs like this.

    favorite 3

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