Containing only 13 subjects, the U4 series of matchbook covers are differentiated from the much larger, earlier series by inclusion of team names on reverse. Each was originally offered with a red, green, or blue border, making for 39 distinct color variations. At least one of each of the 13 subjects is included in this collection, for a total of 22/39 acheivable. Condition across the group ranges from VG-VG+ and each comes complete with original striker, though some do display handwritten notations on reverse. Matchbook covers included: 1) Tommy Carey (Geen) 2) Tony Cuccinello (Green, Blue) 3) Freddy Fitzsimmons (Red, Green) 4) Frankie Frisch (Red, Green) 5a) Charlie Grimm (Home uni, b/w - Red, Green, Blue) 5b) Charlie Grimm (Home uni, sepia - Red 6) Charlie Grimm (Road uni - Red) 7) Carl Hubbell (Red, Green) 8) Baxter Jordan (Red, Green) 9) Chuck Klein (Green) 10) Al Lopez (Red) 11) Joe Medwick (Green) 12) Van Mungo (Red, Green) 13) Mel Ott (Green).