1903 Mannlicher Schoenauer 6.5x54 Rifle
The scope itself is marked "Kahles" over top of "Wien". Underneath that is stamped "Heliavier". It looks to be in good shape with some bluing wearing of of the edges. It has a Duplex reticle and seems bright enough to me. There is adjustment for 100, 200 and 300 meters, and serial number is 21995. Looks like maybe a 4 power fixed?