Serial no 2674 - Timex 27191 Wristwatch

This site gives maker information, but the serial number help is just waffle.

https://jules-jurgensen-serial-number-list.peatix.com/

To find what it is, click the images tab

https://www.google.com/search?q=Jurgensen+Ladies+Swiss+Wristwatch+17+jewels+rectangular+movement%2C+14K+gold+case

https://www.google.com/search?q=jurgensen+ladies+swiss+wristwatch+serial+number+lookup

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if you can't see it on the back, it's probably inside the back cover.

Check out the brand/manufacturer name and the serial number. Google out the contact number for the customer service for that brand/manufacturer and once you speak to them, provide them the serial number, they will answer your query to your expectation.
Regards,
Harry
[email protected]
+1 (503) 583-2414

Just enter the keywords Serial number search in the search bar of your browser. I just did that and came back with a serial number registry. here is the link.
Serial Number Registry Search
You can refine your search by specifying the type of product that your SN relates to.

Usually the serial number is on the case, under the watch band, you will need to remove the band to view the serial number.

serial number odf idm is a great problem

Serial numbers are generally on the back of the watch.

You may be able to find two or three numbers on the watch.

A case number, a movement number and a serial number.Alternatively you might find a style number (which in your case is 26B44) and a serial number.

Yes they do;

To see this go to the TAG web site "tagheuer.com" and select "watches".
Now select "aquaracer" and you will see a list of variations.

1965 theres a full breitling serial number list at http://www.brittons-watches.co.uk/watches_breitling_dates.htm