This is an ultra rare and basically unobtainable high end Japanese item. An Extra Super Light SR Royal crankset with alloy/titanium BB. Cups and lock ring are alloy, axle and bolts are titanium.
The cranks are in excellent condition with very light wear. Original caps are included.
One BB cup has very small pitting marks on the bearing surface from lack of maintenance. These are very very small, but there and shown in the last pic. 52/47 rings in good condition. Original chainring bolts.
PM me if interested.
I also have a matching set of SR Royal bars and stem for a small rider and might have a post somewhere.