Nice Watch
I not sure about the case maker, It would seem that Western Watch Case went out of business in the 1900's according to Pocket Watch Repair Site.
http://www.pocketwatchrepair.com/histories/case-companies/ca se-companies-10.html,
and may have been sold to The Illinois Watch, But I cant, at the moment confirm this.
It could have also connected with the Illinois Case Co, which would seem more likely, but I cant confirm this either!

WWC seems to have been a Trade name for Wadsworth according to the NAWCC
http://mb.nawcc.org/showwiki.php?title=Wadsworth_Watch_Case_ Co

I also have the same model in a WWC marked case, my Movement no is lower than yours, but the case number is higher, not sure what that means, just thought I would add it
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