This is a picture of me holding the camera used by John Glenn in his first flight. I am standing next to the camera engineer who designed and made the modifications.
I can say that these were not trivial as noted in the Photo Net listing. These were made by hand back in those days.
In the background are 2 capsules for the next launches. The one in the foreground is Liberty Bell 7. I later went into the clean room and got to inspect the capsule.
The camera engineer is still with us today and is living in central FL. The camera is "supposed" to be in the Smithsonian.
The names of all of the workers are engraved on the inside of the camera that is there.