Robot II large spring + SLR attachement Viewfinder camera

Robot II with SLR housing. most likely for industrial use. everything works perfectly. the very large spring is not tired and works perfectly (i could fire 54 shots before it ran out). the spring housing is larger than the normal double stack robot II making this a rather rare example. the SLR housing works perfectly as well and is similar in operation to the Leica visoflex system.
comes in the original box with original manual.