farlymac
PF McFarland
The yellow marked escapement is the self-timer.
It is engaged when you push back on the little knob at the top of the housing and move the shutter charging handle beyond this point.
The problems you are experience with the slow shutter speeds might be due to the little blade spring in the slow speed escapement not having enough tension, I can see it has uncoiled in the red section in the photo above.
That's a good catch, Rick.
PF