Early studio photograph, matting is just a bit larger than the old cabinet photos. Probably from the 1920's
Great pose instead of the usual. Is he giving him a name or an address? Maybe that is the well known "little black book" Picture size is 4 x 5 1/2 and with the matting it is 6 x 8.
Studio is A. J. Armstrong of Spring Valley ILL.
Matting has some spots as does the back. Overall a nice picture