By the way, what I don't know about this rifle is how it was roll-stamped on the top of the receiver ring.

"Made in Germany" is possible, but the rifle was certainly presented, and possibly made, well after the cessation of hostilities. And it was being given to an American general.

It would be interesting indeed if Steyr changed from stamping 1903s with "Made in Austria" during the period before the Anschluss in 1938, to "Made in Germany" afterwards until the end of the war in 1945, and then back to "Made in Austria" for the (one would think) relatively few they made until production stopped!