Looks like a 501 offset to me. The front emblem was replaced. This is not uncommom. My 881 has the emblem off an NAA, which I think looks quite nice.
I see you have the cultivators with your new tractor. Everytime I see one for sale in my area, which is not that often, they don't have the cultivators.
Good luck with it and post some photos when you get it home.