I think the 53 Bowman Mantle is the only non Topps one I have. That set is one of the only non Fleer or Topps sets I have built. I did that one because I loved the Musial, who was absent from Topps sets until 1958. Myt 53 Bowman set, like all my sets, is, with a couple of exceptions, ungraded
I may have one other non Topps Mantle, but not intentionally. I picked this up because it is listed in SCD as a Topps premium send away that was advertised on some high # wax packs in 1963. But I have never seen such an advertisement, so it may not really have a Topps origin
