Proof marks are from Prague proof house. Last two digits are year of proof 1907. Foreigner proof marks could be on the gun too, they bought barrels and actions from abroad. As London gun makers bought from Birmingham etc. Novotny´s are old Czech gun makers family. Mathias 1783-1863)worked in Litomerice (LEITMERITZ) and his son Josef (1818-1876) worked there after him. Prague firm was founded by Jan Novotny in 1865; before he was trained at Lebeda, Mach and his uncle Jan. He worked for royal houses of Austria, Russia, Nederland, Italy, Montenegro, Serbia; really one of the best gun maker of his time. After his death in 1893 was the firm took over by his widow Marie Novotna. After 1904 was the firm known as Antonin Novotny (1871-1938) Antonin was son of Jan.
Uncle of Jan Novotny found firm in Vienna, his follower is Springer of Viena supplier of Habsburg’s.

Regards from Prague