This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Collection Item Summary:
Mercury spacecraft were fitted with a periscope similar to this device, made by Perkin Elmer, which allowed the astronaut to make precise observations of the Earth below. The scope had a removable filter, and two magnification settings. This is an unflown specimen.
Transferred from NASA to the Museum in 1977.