Here is the M-S offering from the ca.1910 Stukenbrok, Einbeck mail order catalog. It shows the round pistol grip. Note, it lists the 6.5x54 M1903, the 9x56 M1905 and the 8x56 M1908, but not the 9.5x57 M1910. The 1914 Franz Sodia, Ferlach and the 1911 ALFA catalogs show the M-S with round pistol grip too.