It looks a little off but it may be a vairent of the tt-33 cheap surplus pistol. If it is its worth like 200-300$ and is a blast to shoot. And ammo is as cheap as dirt. Much like sks ammo
Getting back to the original question - any Browning 9mm Hi Power is desireable. Although the foregoing conversation would make a fellow leary of firing a Waffenampt marked example. For a collector who wants 'one of each' this is a good start on filling those gaps.
...and how did they gather knowledge of the things going on in the field? give me a break, that's pure fiction.