Currently working and was tested over a 20 hour period & gained 2 to 3 minutes, its going to need a service to keep perfect time. 1904 Waltham, Grade P S Bartlett, Model 1883, 17J, 18S, stem set, stem wind, 24 hour dial with date serial number 14036327. Its an interesting case, the outer is coin silver but the inside lining of the case back appears to be Nickel, there is also a gold image of a Locomotive inserted into the case back. The case is 56.2mm in diameter. Very nice dial.