more pice for the top lever drilling
SN is 19064 W.Collath Söhne also for the 7x57 19064, the other barrels with 9,3x72R seems to be old but reworked for this drilling with SN 11803.
maybe the owner of this drilling had the gun 11803 before and it came out of service for some reason so the old barrels was fitted to the new gun and he could use the old 9,3 ammo