The differences between the 1910 and 1922 are the following. You have that distinctive round cap at the end of the slide to accomidate the new 113mm barrel in the 1922 (as opposed to the 88mm barrel in the 1910). The frame was also lengthened in the 1922 so it could hold larger capacity magazines. And finally they added a lanyard ring to the frame (which has been removed on this example).
Basically the 1922 was intended for military contracts, well the 1910 was more for the civilian market. Some people also refer to the 1922, as the 1910/22 as it is the same basic action, just with some adjustments. Almost like the 1903 Browning has some small civilian variants, as well as larger variants like the Husqvarna 1907 which were intended for militaries.