This is an extremely nice / rare pocket watch, only 3,200 of the movements were made + it's a transitional combination key wind & stem wind. Currently working and ticking strongly, was tested over a 20 hour period and gained approx 4 minutes. It will need a service to keep perfect time. 1881 Illinois, Grade Miller, Model 3, 17J, 18S, lever set, stem wind & key wind with date serial number 62589. The double gold plate case (see photo of case certificate) is 55.1mm in diameter. Very nice dial with a few small losses to the edge between 12 & 2, case back has some plate loss around the edge, the bow has a lot of plate loss.