Hamilton Military 4992B, 22J, 16S, Adj.6, SN4055388
in Keystone Base Metal CaseSN# 765159,
Case Width: 51mm
Gross Pocket Watch Weight: 106.7 grams
APW – Hamilton, Grade 4992B, military “Master Navigation Watch,” 22J, 16S, black metal GCT (Greenwich Civil Time) 24 hour dial, SW-hack-set with sweep-seconds, mono-metallic balance wheel with elinvar hairspring, fully capped lever escapement, striped pattern nickel damascene
04-1072