Yes, the base was a Mack NR 14.
Rosenkranz from Witten/Ruhr entered the heavy haulage sector in the course of post-war reconstruction. In this context, there was a shortage of truck and trailer cranes. So these were developed according to their own ideas and built in cooperation with companies from the region.
The K200 was one of the first and most powerful mobile cranes in Germany and four were built for Rosenkranz. See pictures one and two.
Mobile crane construction became a mainstay at Rosenkranz, culminating in 1971 with the K 10001, the strongest lattice boom mobile crane in the world with a lifting capacity of 1000 tons. It was involved in the construction of the Köhlbrand Bridge in Hamburg, among other things. See pictures three and four.
This was a small sideways glance at an area that is rarely represented here. I would like to keep it that way. But as you are probably interested in technology, this puzzle will hopefully meet with a positive response.