RARE GERMAN(1920-1935) D.R.G.M.QUICK DETACH 1 PIECE SIDE MOUNT WITH Half RINGS DIAMETER 26 MM  and Base,7 mm PRISM SIDE MOUNT, GOOD WORKING CONDITION.THIS MOUNT ON REAR SIDE HAVE 2 SCREWS,EACH ON LEFT AND RIGHT SITE TO DO CENTERING. GOOD MOUNT TO K98  MADE FROM DIFFERENT COUNTRIES.