I FOUND A JOHANN PETERLONGO MAUSER SAFARI RIFLE IN 11.2x72 CALIBER

I have been searching for quite some time for Big Bore rifles that were built in my birth Country of Austria,

Well, I just added this one to my collection. It looks unfired in 99% original condition. Brought to the U.S. from Austria by family's grandfather - and likely never fired because there was no ammo available in this country.

Please comment and decipher all the markings for me. I'm still smiling ear to ear.