Electronic Hamilton Help

Thread: Electronic Hamilton Help

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  1. #1
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    Electronic Hamilton Help

    I bought this watch today while on a work trip. It was only $3.00 at a local thrift store. I opened the back up at the store, and the movement appears clean and shiny. It does not run. However, I have no idea where the battery lives. I didn't see a battery in there. Any tips? Thanks
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  2. #2
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    Re: Electronic Hamilton Help

    I have 2 of these. And it's evident where the battery goes so I am intrigued. Can you show the caseback and the movement compartment?

  3. #3
    Member odd_and_vintage_fan's Avatar
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    Re: Electronic Hamilton Help

    Should have an ESA Dynotron inside. Look at the middle of this page for a couple of examples with battery installed.

    Transistorised Movements with Balance Wheel - Electric Watches

    Looks like both take a 389 battery from the pictures.

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  5. #4
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    Re: Electronic Hamilton Help

    See the photo with the arrow. Is that where it goes? Under the metal flap?

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  6. #5
    Member odd_and_vintage_fan's Avatar
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    Re: Electronic Hamilton Help

    Bingo.

    As always, be careful and go slowly when using a screwdriver near delicate parts. I don't yet own one of these, so I'm not sure of the procedure for removing the battery cover. If I found one for even 10x what you paid, I'd be happy.

    Congrats on the pick-up and I hope it takes off running for you!

  7. #6
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    Re: Electronic Hamilton Help

    Nice watch. It is a ESA 9150

    The battery does go under the that flap.

    The original battery was a mercury battery #343

    As mercury batteries are not in production, the replacement battery is a 344

    Unlike the Accutrons, putting a silver oxide battery in it will not cause any issues.

    If the watch does not work when the new battery is put in, try giving it a couple of smacks to the 9 o'clock side on your palm

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