Detail of pilot's window. The writing on the window says, "This equipment
built for NASA by McDonnell Douglas." Of course, the company was known as
"McDonnell Aircraft Corporation" when the equipment was actually built, and
Boeing has since acquired McDonnell Douglas, but such are the vagaries of the
Aft of the the window, one can see that the shingle upon which the Sigma
7 was painted has been replaced by a piece of Plexiglass. This
can also be noted in the overall side view.