This is a NATIONAL (early Elgin) key wind key set pocket watch The serial number is 94152 which makes it 1869 or 1870 . Nice blue hands, clean dial, beautiful beveled edge crystal with one small flea bite at the edge near the four. Clean Dueber case all doors snap shut OK. It usually runs rather well but it has been know to stop from time to time. After being started once or twice it seems to be OKÂ the rest of the day.