Produced circa 1953, size 16s, model 5. Case marked: Hamilton Watch Co/Stainless Steel/Lancaster, Pa/R553439. Movement serial number is C396929. Runs well for awhile, but may need fine tuning. A few light hairlines on face. Light wear on crystal and on the watch as a whole. Comes with watch fob that has Philadelphia, 1936 Master Brewers Ass'n of America medallion on the end of it.