Currently working, ticking strongly and was tested over a 17 hour period and lost 4 to 5 minutes, it’s going to need a service to keep time. 1888 Elgin, Grade 97, Model 1, Class 6, 7J, 18S, key set, key wind with date serial number 2559261. The Deuber Silverine case is 57.2mm in diameter & weighs a hefty 151.5 grams. Superb dial, great case. With a service the new owner will have an outstanding pocket watch !!