Tom & Bill Mars
Studio shot of Tom & Bill Mars or Marrs.
I have other photos of these boys on horses, in corrals, on a ranch, one with my grandfather Lois Campbell. One place is identified as White Lake. I think that might be TX but I don't know. Grandad worked on several ranches around west TX in the 1930s-40s until he bought his own near Carlsbad NM in the 1940s.