While I love the subject of the first photo as much as anyone here, I am also interested in it for its photographic qualities. I love the tonality, depth of field, and sharpness. I would LOVE to know the camera and film used. I know the OP doesn't know, but I would guess it's from a medium format picture and maybe Tri-X film? Pure guess on my part. Any other comments from photography buffs?
Ooops - found the caption at Shorpy:
Washington, D.C., circa 1926. "Standard Automotive Supply Co., 14th & S streets N.W." National Photo Company Collection glass negative.