Here is a drawing of the W23694.
Below it is a "post wad" which appears to be the same except a post is built into the center of the wad; post-wad was designed for 16 yard trap from a full choke barrel. Basically it is an early attempt at a spreader. I have a box of 1000 post wads that I may use for that purpose sometime.
From my investigations, the All-American hull was the last high basewad low-brass target hull that Remington made. All-American had a plastic basewad. Previous to that was the Rem. Plastic Target which differed in that it had a fibre basewad, but I believe it shared the same internal capacity and loading data.
I agree that Remington is of no help whatsoever when it comes to data for their reloading components.
@ Farmer Dick - Am I to understand you use the W23694 (aka RPA12) in modern Rem hulls or Win AA hulls with 1 1/4 oz shot? If so, do you use it as a direct replacement for WAA12R? I agree it is about the same size, but I have not gotten around to trying it.