This binding was made by black diamond 15 to 20 years ago. Just curious and want to know more about them.
Incase it's not obvious the red cable is completely detachable.
It was called the "XCD Cable" . It predates the Riva designs, so more like 30 years ago. I think you should be able to find some with the Chouinard logo.
Now that I think of it, Rottefella had a similar design around the same time...and I might even have a NOS box of those.
That was it. Mine where Chouniard. Then I upgraded to Rivas. I had a couple of Rivas and Riva 2s.
I have a pair of those on some TUA telesauvage skis I bought used in Italy in 1991. only issue I ever had was the cable pulled out of the spring on a tour once. pushed it back in and recrimped the spring with a leatherman. I haven't skied them for about 5 years.
Ahh ..... Asolo Extremes + taped toes/heels/boney protuberances ....... such fond memories! "upgrade" to Rivas - hah! How far we've come. I didn't have the XCD cables, but did get to experience something called "Telemark Extreme" bindings, where an exposed spring heel cable hooked to the toe piece a la the hardwires, and had a side throw like the soon-to-arrive Rivas. the toe piece, while not actually having 3 pins, had holes where the pins would have been, so I made my own pins out of 8p nails. Sort of worked.
I had the old set-up out a few years ago for a few BC laps, I was amazed that I could still link some pow turns on that stuff without a faceplant!
I also had the original Rainey binding which featured a pretty bomber stainless steel toe piece with 2 short cables going back from it. The cables where connected by a piece of heavy surgical tubing that you would stretch back and snap into the groove in the heel of your boot. I had these mounted on a pair of old Olin Mark3 Comps that I saved from a pile of old skis behind my friends house.