Coal pickers by Martin, Robert (1888 - 1971)
Lithograph, full margins. Signed in pencil, lower right, “a good clean impression”.
 
Matted, Image size: 10.6in x 8.5in (27 x 21.6cm). 
Overall size 18in x 14in (45.7 x 35.6cm).
Made in: US, 1940 
Art-In-Industry collection number pp_138