ar43 coded K98k made by Mauser-Borsigwalde (Berlin) in 1943.  This example shows early use of the stamped sheet metal parts (rear band only) with an E/135 waffenamt (Mauser Oberndorf).  The bolt has an E/WaA140 waffenamt stamp indicating that it was a subcontractor provided part made by Fabrique Nationale in Belgium.