I was doing my usual eBay tonight perusing and came across this image of Pablo Garcia wearing a similar jersey. He's not as famous as some other Cuban ballplayers of the time, but he's notable enough that it might give you a lead on the Team pictured. I don't believe he is in your RPPC, however. Good luck!
https://www.ebay.com/itm/14468924926...Bk9SR_TIu6vEZA
