My understanding is that the PC back only made it into one year of production in the mid-1950s. ESCo re-used images for years and years. The rookie season pic of Mantle appears throughout the 1950s. Check out this uncut sheet with a Rocky Colavito Detroit (where he was traded after the 1959 season) right next to a Salutation Ted Williams, and look at the Mantle bottom right. That sheet has to be a 1960 or later issue yet it still has the Mantle with the rookie year patch on the sleeve.
