Antique 1911 Elgin Grade 315 Model 3 Gold Filled 15 Jewels 12s Pocket Watch Runs. Elgin grade 315 model 3. Pocket Watch has a super neat Tri Color gold filled case, its yellow / white / rose gold filled! Watch is 15 jewels and a size 12s. I got the information in the title from looking up the serial number online. Watch runs when you wind it. But it needs a service but it will run when wound up.