A couple of weeks ago I posted photos of the mirror cell for the 200-inch telescope as it arrived in California via ship. This week's photo was taken January 27, 1936 - two weeks after its arrival.
It shows the mirror cell sitting on the mirror's grinding machine with a member of the optical shop posed sitting with his legs in the center hole. Note that there are three other people in the photo working on the rail to the upper right of the mirror cell. Unlike the man posed on the cell, they were working look blurry - a result of the slow films in use back then.