I have an August Schuler in 7x64 Brenneke which is somewhat of an enigma. It was built in 1941 and patterned after the Mauser African Model of 1905 with a 3/4 length stock and finely engraved. Big difference between the 7x64 and the 11.2 x 72 Schuler/.500 Schuler so apologize that I have nothing to offer in that arena! However, I too have been trying to obtain additional information on the company. The only item I have tracked down at this point is a reproduction catalog available from the German Gun Collector's Assciation (catalog date is not listed) but it is a 32 page catalog and is offered for $22. I have not ordered but intend to soon so will offer up a review once in hand. Best of luck and please let us know if you run across something!