A Rare 9.5mm cal. Peterlongo Take-Down Mauser - cased

I wonder if anyone else saw this at auction this weekend. Its the best Peterlongo I have ever seen. The 9.5 caliber is actually a .375 caliber - but not sure if its a 9.5x57, or a 9.5x60 cartridge, or ?? ... anyone with info on what this caliber might be, please chime in. And .... its on the way to join its big brother here in Wisconsin.

as always, your comments are most welcome.

http://www.buckstix.com/buckpics/peter-000.jpg