I think that it may Alexei Mikhailovich Korin, nor Alexander D. Korin, nor Andrei Mikhailovich Korin. However, the site
http://www.findartinfo.com/search/li...8&name=A_Korin mentioned a certain "A. Korin, 1924 - 1994". Among his paintings mentioned painting entitled "An Arab Gun Trader". Few in the theme to your picture. Maybe you'll have this "A. Korin"? Unfortunately, it is almost unknown, and reproductions of his works in the network, I have not found, a signature does not compare.