Here is a link to Bob Lemke's Blog - Saturday, April 16, 2011.
This page basically backs up the Baseball Card Society letter form above. Thanks to butchie t posting.
“The most recent information provided sheds some light on a variant of what the hobby knows as the "Bond Bread" issue of 1947. In reality, the New York baker was only one of several businesses that used a series of 44 baseball player cards and four boxers as promotions in the post-war era.
The genesis of the cards was a Chicago publisher, Aarco Playing Cards, that originally sold the cards in 1947 in boxed sets of 12 under the name Collectors & Traders Sports Star Subjects. The cards are black-and-white, blank-backed, 2-1/4" x 3-3/8" with rounded corners. Photos are borderless portraits or posed action shots with a facsimile autograph or script name.
That year, the N.Y. baker of Bond Bread evidently contracted with Aarco to obtain a quantity of the cards for distribution in loaves of bread. Later, for reasons unknown, square-cornered versions of half the cards in the set, printed on different card stock, were also produced.
Besides the boxed set and bread cards, much of the checklist of this set, along with at least one player that didn't appear in the original form, was used in a series of Exhibit-style larger-format cards and in a set of premium pictures in 6-5/8" x 9" format.
There was also a seldom-seen variant using the baseball/boxer pictures on one side, paired with Western movie stars on the backs. These were issued in perforated sheets.” (Bob Lemke's Blog).
https://boblemke.blogspot.com/2011/0...ond-bread.html John.