Martin Bruehl (1895-1980,) was the elder brother of three-color assembly process pioneer Anton Bruehl and though less celebrated was an equally gifted photographer.  In fact, the Bruehls worked together in their New York studio for over forty years and the work for many of their assignments was shared between them.  

Note the color and gray-scale cards at bottom center.

Click on image to enlarge

Untitled (Interior)

Martin Bruehl, 1935
vintage dye-transfer print
10″ × 12.5″