Currently working and was tested over a 15 hour period and kept near perfect time, maybe 5 to 10 seconds either way. 1942 Hamilton G.C.T., Grade 4992B, Model 5, 22J, 16S, stem set, stem wind, 6 adjusts, centre seconds sweep hand...
Currently working and as a matter of interest was tested over a 16 hour period and kept near perfect time. The base metal case is 51.4mm in diameter. 1944 Hamilton, Grade 4992B, Model 5, 22J, 16S, stem set, stem wind, 6 adjusts with date serial...