Sorry, this rifle was removed from the auction, so I have no link to provide for it!
I have been unable to find any history on this particular rifle, which is an experimental mixture of parts, including a bayonet lug and a sporter-style rear sight on a 7x57mm 1893 model Mauser action. What is interesting about it, though, it the automatic muzzle cover connected to the trigger. The front sight is mounted to a spring-loaded muzzle cover, which lifts up as the trigger is pulled. Once the trigger is just ready to fire, the front sight is fully elevated into position for a proper sight picture. It's pretty clear why this really interesting idea didn't make it into production...