Vintage 1952 Hamilton Railway Special 21 Jewel Pocket Watch 10K Gold Filled 992B. After winding you have to give it a little tap. Once it running it keeps running and keeps time. Back cover reads (9671831 Keystone Watch Case JBoss 10k Gold filled). Serial # on movement is CC355005.The item "Vintage 1952 Hamilton Railway Special 21 Jewel Pocket Watch 10K Gold Filled 992B" is in sale since Friday, November 6, 2020. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Pocket Watches". The seller is "thecentralmarket" and is located in Dallas, Texas. This item can be shipped worldwide.