"Super Record" cranks really refer to the chainrings. In my view the only true Super Record cranks would be the last generation, no fluting of the crank arms.
As Super Record began before the CPSC modifications, the real determining factor for spindle length needed are the dimensions of the crank.
the date code on the back or lack thereof gives a useful direction.
As stated earlier, the dimensions used for the spindle do not match what you have. It would be interesting to see what the markings on your spindle are.
For additional guidance on what to get, check the chain line as installed with what you have with a suitable straightedge, I use the Campagnolo tool and flip it just to make sure.