I can confirm the Trivia post about Sweet Swatch Serial Number variations. Here's what I own. 2 Sweet Swatch Classic Jersey cards of Robin Yount. One S/N to 340 which is listed in Beckett. The other card is S/N to 460 which is not listed. The same goes for 2 Don Mattingly Sweet Swatch Classic Bat cards. One is the listed print run of 340. The other non-listed card is S/N to 490. I also have a Kirby Puckett SSCB card S/N to 251 which is not the listed print run.