Vietnam US Military Army AC Navigation Hack Watch with NATO band. Type A7, Serial number A0-35-166. I bought this watch at a military flea market in Ho Chi Minh city two years ago. Runs well. Keeps good time. Probably needs a cleaning. I’m not a watchmaker only a collector. I’m selling this watch “as found” so bid accordingly. I make no assumption as to maker or model. These were inexpensive watches sold at the PX’s .