A super rare model, only 7,300 produced during 1909, you have to wonder how many still exist. Working and was tested over a 20 hour period and lost approx 30 seconds. It will need a service to keep absolute perfect time. The gold plated case is 50.6mm in diameter. 1909 Hamilton, Grade 952, Model 3, 19J, 16S, lever set, stem wind, 5 adjusts, double sunken dial, double roller, railroad grade, motor barrel with date serial number 753336. Nice dial, inner case back neatly engraved and dated 1910, see photo.