Photometer Head (Sight Box), Lummer-Brodhun, Max Kohl
A Lummer-Brodhun cube and absorption screens are  mounted in the front of the box. One diagonal of  the cube is a contrast pattern that is observed using the telescope. A removeable partition separates the two spaces at the back of the box. The sight box is rotated about a horizontal axis so that light from the  two lamps can be viewed on either side of the cube.(1)
This was possibly made by the Max Kohl Company.

(1) Cenco catalog J200, page 563


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