Wait!
Hold the boat/phone,
I was moving the one stand that’s being employed and found the model number in the usual place on the clamp receiver!
I had rags and some tubes draped over the model number decal!
It’s a PRS-13!
Much information was found on the Park Tool site!
I’ve written for more information; price, years made, how many were made…


They have the Extreme Clamp installed in the picture, but show a much earlier clamp in the parts section: so maybe Park Tool did make it for more than one year… I’ll keep y’all posted!