The movement said : Hamilton Watch Co. USA - 992 B -21 Jewels - Adj Temp and 6 positions!
Movement serial number : C 371163. From the American Horology Archive.
Production year of the movement within +/- 3 years" style="box-sizing: border-box; -webkit-tap-highlight-color: transparent; color: rgb(27, 118, 176); text-decoration-line: none; background-color: transparent; -webkit-font-smoothing: antialiased;>. Hunting: The stem is at the 3:00 position, and the movement is meant to be mounted in a case that has a covering over the face. "Sidewinders" are hunting movements in openface cases. " style="box-sizing: border-box; -webkit-tap-highlight-color: transparent; color: rgb(27, 118, 176); text-decoration-line: none; background-color: transparent; -webkit-font-smoothing: antialiased;>. 22.3, 38.0, 57.1.
Production year of the movement within +/- 3 years>. Production date of the movement according to factory records.