Good evening,
Having looked closely at both photo's again there are acouple of anomaly's.
In photo 1 he is definately a 2nd Lt, 1 pip and one stripe around the cuff. He is not showing any medal ribbons even though the 15 star had been awarded, (medals weren't actually issued until after the war)
In photo 2 he is now a Lt, 2 pips and 1 stripe around the cuff. He is now showing 2 medal ribbons but there should be 3, they don't go far enough across the pocket for 3. So taken post war but when. Cuff rank badges for officers were abolished in 1920 when they moved to the shoulder. All medals had been issued by then and, mostly, applied for by the recipients.
This begs the question, are both photo's actually the same man. It's difficult to tell as photo 1 has been enhanced by someone. Much as the experts do here on rootschat.
John915