Presented here, the final stage prototype of the Rotating Reciprocating Vertical Shaft Type 2 mechanism.
This is the completed mechanism
ready for coloring and photography.
The vertical shaft turns back and forth as the handle is turned, In total the travel is just over three quarters of a turn
each way.

Turn the handle to drive the crank…

…which in turn moves the hinged plate back and forth…

…driving the belt and turning the vertical shaft.

Seen below is a video clip of the final prototype in action taken from my Instagram stream