Good morning !
Notwithstanding your -probably valid- considerations about the markings, fact remains that my father received that watch from the belgian air force ... it was never a watch that he bought and got military markings done on it. Actually, he bought a watch upon his return from Germany, a Doxa chronograph that I still own today but abandoned it when he received the Tissot ! Hence my opinion : the watch was an endowment, the markings are perhaps not fully faithful to some rules, but it is a military watch nonetheless.
Thank you for your attention,