sevo
Fokutorendaburando
The camera looks like Beaulieu News 16 with a mighty big lens stuck on the front of it.
Unlikely. The Beaulieu has no coaxial mag, and is (apart from the integral shoulder grip) roughly modelled after the Arri 16s. It could of course have been modified, but once we assume that, it could be everything...
Another camera with coaxial mags is the Aaton XTR, or its predecessors - but I don't know whether its lineage goes as far back as that one, the ones I've rented in the past decade were visibly more modern.