I bet the shoulder mounts and pebble buttons are a creative addition. After 70+ years they should leave some sort of telltale bedding mark on the surrounding leather. Also that pebble button has an extreme amount of wear. Not original to the jacket and likely found dug up somewhere. Shoulder buttons are usualy not exposed to heavy wear. Even if jacket is original it has been messed with to deceive IMO.Late to the party here, but this is a original Luftwaffe issued jacket. These jackets were issued later in the war to try and help boost morale. They are pretty rare and usually command a pretty good price. The loops for rank shoulder boards are something sellers will add at times to try and increase value which may or may not be the case here. For more info on these jackets look to Mick Prodgers book " Luftwaffe vs the RAF"