As some of you are identifying rifle and bore size from a photo, what do you think of the double barreled jobs to either side of my Grandfather's M1910 Mannlicher Schönauer? The one held by the guide to his right looks enormous compared to the other.

Grand-dad (John F. Easton) is at center. The M1910 is, of course, 9.5X57 (.375 Nitro Express Rimless).

The photo is ca. 1932.