Currently working but ticking a tad slow, was tested over a 15 hour period and lost approx 3 to 4 minutes. It will need at least a service to keep perfect time. 1912 Hamilton, Grade 992, Model 1, 21J, 16S, lever set, stem wind, 5 adjusts, gold screw setting, double roller, railroad grade, double sunken Montgomery dial with date serial number 1001705. The 10k rolled gold plate case is 49.6mm in diameter. Dial has a crack, perspex has wear, case back is worn.