The centerfire autoloader would be the 740 Woodsmaster series.
The 760 Gamemaster pumps looked the same.
However, I don't know how much stock I would put in the 552 being designed to look like one.
If you think about it, they all also looked like an 870 Wingmaster/1100 shotgun too!
I think that's just the way Remingtons looked when all those guns were designed.
rc