The movement or film transport is made by Albert Darling and his logo
is stamped on some of the metal camera parts. It is a blend of an
A and a D. One of the "A+D" logos can be seen through the "Pictures
Per Second" window on the crank side of the camera. There are two
round windows on the crank side of the camera. The upper window is
the Pictures Per Second window and the lower one is the footage counter
window. They both work and they both still have their original clear,
although yellowed with age, covering. I think it is clear celluloid
as plastic wasn't available.