BASEBALL CARD magazine over the years included inserts of baseball players. The inserts could be removed and the strips left intact or carefully cut with a razor blade. These cards are unique. The reverse had some stats and a narrative. See photos.
This strip is from the 1990 magazine issues. The cards are in the style, layout, design of 1969 Topps card series.
This strip includes Mark Grace, Bobby Bonilla, Ryne Sandberg
Sold as a strip of three cards with free mailing.