Trask, there is a vertical slit and what appears from memory, to be a shutter blind (so to speak).

My 202 is loaded with film so I cannot look.

Basically if you put the camera to the slow speed rotation, set the f/stop to wide open, sit in a darkened room with the camera on a tripod and facing a lighted doorway, open the back of the camera, and trip the shutter, you should be able to see a vertical slit of light traversing the round steel section of the rear of the camera from one side to the other.

If you need more help I can look at the camera over the weekend as I'm using it on Saturday morning, when I'll change film.