German Loop Cars 1952
Yep..German Loop Cars 1952...Great footage from a great resource.
I have only seen a few pictures of this infamous ride before. AFAIK it was operated by German showman Gropengiesser for a short time with the two loops. As you can see this is clearly a side-friction coaster with no upstop wheels!
You can also see why the ride was such a health risk for riders necks and spines: they all lump forward as they enter the first loop, unable to keep their heads up.
I think the loops were eventually removed and the coaster continued to operate without them.