Key card of a 28-card set that was originally issued by being stapled to milk cartons. The cards were redeemable for a variety of prizes and when redeemed the cards were hole punched in a corrner. Those two factors result in an extremely condition-sensitive issue as holes and staple marks are common. This example of the issue's key card Hank Aaron has been graded PR 1 with an MK qualifier reflecting the Lake to Lake stamp on the reverse. Of course the staple hole is present at the upper right but there is no cancellation stamp visible on this card making it extremely desirable. The remaining condition issue relates to very mild staining and what appears to be some paper remnants near Aaron's bat barrel. An extremely desirable card in any grade.