Ladies art deco


Any information on this watch would be really appreciated. I believe it to be art deco ? 1920's, but I really have absolutely no idea what year it was manufactured.

It has 10 genuine diamonds, and the case is 14K white gold. The bracelet is 10K gold filled with a leather insert. It is 17 jewels. That is all I know about the watch. I purchased it because I liked it, however the bracelet is far to tiny to fit me.. does anyone have any ideas of how to extend the clasp? also any ideas of value ?