Anyone know anything about these watches?

Hello everyone! First post here, been collecting watches since October and I hop on this app to browse other people's collections for inspiration of what watch to get, or as of recently for Seiko modding.

About 3 weeks ago, I saw this listing on ebay for non functional CompuChrons (shown above) without battery, as they are quartz LED watches. They are too thin for a LR44 but the battery is the perfect diameter. I've ordered batteries that are about 1.5mm smaller to see if they fit and more importantly power the watch.

As far as I can tell, there is little information about these watches online. I know these images may not be enough for many, and in which case I am happy to add more if necessary.

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A 1970s watch. Best I could find about about the brand. This one isn't exactly the same model but the same company

https://www.flickr.com/photos/51764518@N02/23943619151/

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hasenfeffer

A 1970s watch. Best I could find about about the brand. This one isn't exactly the same model but the same company

https://www.flickr.com/photos/51764518@N02/23943619151/

I've seen those before but not the same shape, I'm wondering if this was a limited release or something? I bought the watches from a European seller, and every time I look into it I just get what you posted... very perplexing

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Their calculator watch was used on Battlestar Galactica

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Stroud_Green

Their calculator watch was used on Battlestar Galactica

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That's really neat! I just figure if they had such a prominence then they'd have more info on these two smaller watches.

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You can check a battery size chart for some that are thinner but the same diameter. Perhaps SR43?

https://www.batteriesinaflash.com/watch-battery-cross-reference

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skydave

You can check a battery size chart for some that are thinner but the same diameter. Perhaps SR43?

https://www.batteriesinaflash.com/watch-battery-cross-reference

I'll order one of those if the ones I bought were too small, thank you!