Apologies for any confusion I may have caused. I simply looked at what I consider "mainstream" Mantle's i.e. Topps and Bowman. Should've been more clear.
The discussion on '56s white vs gray got me thinking. Check this out. Percentage of total grades for each variation. '56 gray backs follow a typical bell curve with a few low grade, a few high grades, and most in the middle. That's typical of nearly any '50s Topps star card. The '56 white back is much more commonly found in low grade with nearly 25% of all '56 Topps White Back Mantle's receiving a '1' grade.
