Antique Pocket Watch Jewelers

Is there an online resource for look-up value of an antique watch?
I have a pocket watch circa 1920 gold and I want to see if the value My jeweler she appreciated the accuracy.
A good starting point would be a search for "completed auctions" on eBay. To do this, by going to "search", click "Advanced Search", then place in your brand of watches and descriptive words, scroll down and check "completed items, and the result will be what the items are actually sold during the last weeks. (You must have an eBay account to use this feature Advanced Search.) Good luck!
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