Looking for info on Palma 22 box


I just bought a Remington Palma Hi-Speed box with an over-label and the ends are missing. I’d like to find out what box Remington used under this Palma over-label. Dunn has it listed as a REM-52 LR-10 and it was supposedly a standard velocity box (maybe?). Does anyone have this in their collection and be able to check what box ends it has? I don’t think that there’s many of these around.

I know that they used the model 21 LR “dog-bone” boxes earlier to over-stamp the “PALMA” on them.