There is so many different Locle pocket watches it's impossible to say for sure without more information and would be speculation on my part.
To get the most accurate info the best thing to do is take a picture of any numbers and hallmarks and post them along with the request for info on a watch forum.
The links below are your best bet.
Hope this helps and good luck.
http://forums.watchuseek.com/
http://home.watchprosite.com/
http://www.classicwatch.com
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