JBS, I kind of doubt these samples are reproductions. The reason I say that is two fold, first you have a true subject expert, Bob Seijasicon, who is looking for answers and if it was as easy as labeling it a reproduction then that would be the end of it and no further discussion would be needed. Second, there are period and modern photographs showing this anomaly rather clearly. I am curious as to the photo links Mr Seijas posted and to whom this rifle belongs. A close inspection would be all telling.