this are pics of two different rifles in 445 Grasset Nitro sold in France found by hardrada55

this looks like a plain working rifle without checkering

and this is the sensation

a Grasset cataloge page showing beside Mauser and Mannlicher Schönauer rifles the 445 Grasset nitro and under the Lebel also a rifle build with a Berthier action

it seems the berthier got a new box magazine for the .445

to bad the copy is not readable

now I have to find an original cartridge or get a chamber cast of an original rifle to confirm my theory the .445 is a 11x59R Gras case with the rim dimensions of the 8x50R and a flat nose jacketed bullet.