Gyromatic project
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Thread: Gyromatic project

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  1. #1
    Join Date
    Jan 2010

    Gyromatic project

    I thought I'd share my experience with a cool watch I found this weekend. I bought a small pile of watches at a flea market this weekend. This one was in such bad shape, I didn't look at it until I got home.. then I found out it was a Girard Perregaux Gyromatic!

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    The watch has an ETA 1256 automatic movement. I took it apart and overhauled it, but I found out that the reason it wouldn't run was because the center gear had a bent end where the seconds hands attaches. I tried to bend it back but it broke (they always do). Frustrated, I just put it back together and figured it would just have 2 hands. lol

    Later I decided to see if I could maybe source a seconds hand from a parts watch on Ebay or somewhere. Then I saw an article on the Internet that said Benrus used the ETA 1256, so I thought I'd see if I had a parts watch in my Benrus junk. What I found was a Benrus parts watch that had an ETA 1080 manual wind movement. The bridges looked similar so I did a search for ETA 1080 and the first line in the article referenced that the ETA 1080 was the base for the ETA 1256! Here is a photo comparing the two movements (my watch is on the left, and thanks in advance for Mr. Ranfft for letting me use his pic for comparison)...

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    I only need to remove two parts (the one bridge, and the ratchet gear) and I could pull the gear out I needed; dropping it back in my watch was just as easy. Then all I needed to do was put the seconds hand on. I though it was cool that I could use a gear from a manual wind watch to fix an automatic watch!

    Here's some pics of the watch and movement..

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    Really cleaned up nicely and keeps great time! One more thing.. Buff up the case or don't buff up the case? I like the scratched look because I think it matches the condition of rest of the watch. Any thoughts?

    Regards Ron
    Last edited by RonD.; July 16th, 2018 at 06:08.

  2. #2
    Member Hose A's Avatar
    Join Date
    Jun 2018

    Re: Gyromatic project

    Very cool!

  3. #3
    Join Date
    Jan 2018

    Re: Gyromatic project

    I like the case as is, it seems right.

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  5. #4
    Member bsshog40's Avatar
    Join Date
    Apr 2015

    Re: Gyromatic project

    Nice find and great fix!!
    Bobby - My original music! Check me out! Thanks!

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