it looks if it has a fixture for a belt drive on the rear r/hand side
Not to drive anything else, it's just a dummy, but it does have a use, it's the rear brake. A "V" shaped block of friction material is pressed into it by a foot peddle. "Brake" might be rather a grand description though, it doesn't do much in the of slowing you down
You should be able to see the mechanism and friction block towards the left of the photo.