I never seen any confirmation about military background of this model. E.g. no any markings on the caseback. So, it could be rumors. Btw, if you compare military watches from that era you''l find Arabic numerals which are quite useful in a cockpit (I could confirm this when I fly with my B817, H1550SG or even with Lemania 817), but that Zenith 146 HP have lume dots only. But if you have more info about Z146HP please let me know!