Civil War CDV Captain Joseph Parker 32nd US COLORED INFANTRY Philadelphia PA
According to the research that was included with the photo, this is Captain Joseph M. Parker of the 32nd Regiment US Colored Infantry Company G. Company G was organized at Camp William Penn in Philadelphia in 1864. This photograph was taken in Philadelphia, PA. NOTE: There is, what appears to be, a bite mark on the upper/right corner of the photo. Don't ask me why.
Also, all the research done on this photo was furnished by the previous owner. The CDV measures approixmately 4"x2.5".