Currently working and was tested over a 22 hour period and gained approx 30 seconds. It will need a service to keep absolute perfect time. The 14k gold filled case is 44.3mm in diameter. 1937 Hamilton, Grade 917, Model 1, 17J, 10S, stem set, stem wind, 3 adjusts with date serial number X40563. Stunning dial, nice case, some wear to case back. With a service it will be a cracking pocket watch.