6.5x54 Mannlicher Schoenauer

I am trying to find some history and value to this rifle. I've posted some pics, but was unable to get clear close ups of the markings, so I will state what they are. The rifle was given to my father in the 60's by a gun shop owner who mounted the scope and the open sights.

On top of the barrel, just ahead of the rear sight is stamped '6.5 x 54 Man', parallel to the barrel. Also stamped on top of the barrel, just ahead of the breach are the letters 'Y 1903', and above that is stamped an impression of, what appears to be, a Swiss flag emblem, across the barrel. (I tried to get pictures of the stampings, but my camera just blurs when I get that close.)

Stamped on the right side of the barrel just in front of the breach is '434Z'.

It has the original steel butt plate.

It has been quite a few years, but I have fired 6.5 x 54 Norma ammo through it, and still have some rounds left.

Thanks in advance for any help.