Help with Oddball Basketball and Tennis Cards
 

I've been trying to research this set but coming up blank:

https://photos.imageevent.com/exhibi...ooklet%201.jpg
https://photos.imageevent.com/exhibi...oklet%2012.jpg
https://photos.imageevent.com/exhibi...ooklet%208.jpg
https://photos.imageevent.com/exhibi...ooklet%207.jpg

I've figured ca. 1953 based on the information in the write-ups but have been unable to find other examples of the booklet or the stamps. Anyone have anything to add?