Cheapest 1950’s West Germany dockside crane in original box

This dockside tinplate crane is a working toy made in West Germany in its original box, all in very good condition. The paint is perfect with no dents or scratches. All the knobs and cranks work very well. This toy is marked NBN and DBGM. I am not a toy expert but this looks like a fun piece for anyone's collection. The cheapest crane measures 16” high.