Help with these Team sets
 

Please see attached photo, I have these 4/ 12 player team sets from the late 1960's . Teams are the Braves, Cardinals,Mets and Pirates, 2 have envelopes with the teams name it . All cards are slightly larger than a postcard. Does anyone have any info on these sets . Thanks in advance.

I don't have specific info for you, but if these cards portrayed active players, then it's more likely they are from earlier in the 1960's. The Duke only played for my Mets in 1963 (although Topps had him as a Metropolitan in 1964) and the Braves left Milwaukee after the 1965 season.

1960-1965 Jay's Publishing team picture packs. ETA, they are Jay Publishing, not Jay's Publishing as I mistakenly thought.

Love those Picture Packs. I bought mine at Yankee Stadium concession stands back in the day. Manny's BaseballLand across the street under the subway platform sold out-of-town team packs and so I bought Orioles packs there. And obviously, the teams sold them through the mail.

The Mets is 1964, Duke is also in the 1963 set but is pictured batting.