Actually the Gewehr 98 Sniper used in the film is 100% correct. The bolts on standard Gewehrs were straight but on rifles selected to be converted into sniper's the bolt was turned down to avoid hitting or coming too close to the scope. This is NOT a K98. Notice also the roller coaster sights. This weapon is 100% correct.
The sniper rifle is referred to as a Mauser G98 - a WW1 weapon, and wholly appropriate given that the protagonist was a sniper in WW1. However, the curved handle on the bolt reveals it to be a K98, a WW2 era version of the rifle and not produced until later than the 1932 setting of the film.