Which telescope's model is being shown to Albert Einstein in this file footage? What event might this be? In the Economist video Why does time pass? there is some file footage of Albert Einstein attending some event where a model of a large telescope is on display, and being described to Prof. Einstein.

Which telescopes model is being shown to Prof. Einstein in this file footage? Is it possible to tell what event this might be, or who some of the individuals might be (any famous Astronomers)?
I'm pretty certain it is the 200inch Hale telescope at Palomar Observatory. There is an image galley of the 200 inch telescope. According to Richard Preston's book First Light: The Search For The Edge Of The Universe, Einstein attended the completion of the telescope truss, yoke and horseshoe bearing at Westinghouse Electric and Manufacturing Company in South Philadelphia (page 41) so it may have been this event that the footage is from.

Searching for "celluloid model of Hale telescope" in the Hagley Digital Archive will yield information such as 


  This celluloid mount was part of a 1/32 scale model of Hale Telescope that was constructed by Westinghouse Electric Corporation engineers to test design utility and points of stress. 


and images such as these: