Help identifying longines vintage

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May I ask for some help identifying this longines with those markings and pictures attached,

12401270 longines 17 jewels 19.4
18 carat 7327

 
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Thank you, I am trying to trying to track down the exact model name for it that would be really helpful thank you.
 
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It’s a Geezer Watch!

I briefly looked, but this was as close as I could find:


http://www.vintagelongines.com/index.html#brochure13

Movement dates from 1963, but could have been cased later. Bracelet could have been custom made and lugs removed as was the style in those days. Is the bracelet signed by Longines?

Hope this helps,
gatorcpa
Thank you for taking the time on this, I think the bracelet is not custom made as it’s signed by longines
 
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Thank you, I am trying to trying to track down the exact model name for it that would be really helpful thank you.
There may not be a model name for this watch. A collector would refer to it using its reference number (7327) or possibly its caliber (19.4). Here is another ref. 7327, with serial number 12'775'768.

Source: https://www.dorotheum.com/en/l/5119958/