From looking on the Internet, it seems that it has to be Tavannes - a well-known Swiss watch maker. Here is a page selling many old pocket watches by this company: http://old-pocketwatches.info/tavannes-pocket-watches Also try typing "Tavannes" into the search area at www.ebay.com - not that you want to buy one, but many of the listings might give you more clues to this company and their watches. And of course going to www.google.com and searching for Tavannes might bring you endless sources. Best of luck :)