That's an EAW double-square bridge claw mount. It's literally the finest setup you can get on an M98 and costs more than most rifles do by themselves.
The funny thing is, I don't really care about the cost. If I decided I MUST have $500 or $1000 scope mounting system I can afford to do it.
But what I see on that rifle is a beautiful old school type rifle, with a scope system that looks goofy and is too high for the best use of a scope. Obviously it works for what the Euro hunters are doing, but it's FUGLY anyway. A different scope, some different mounts and it would look real nice.
As always, different people like different things and of something works for you- go for it!