Here is the front of the card.
Great portrait photo on the front of the card.
The palm trees in background, really high probability that this was a Spring Training card from the 1960s. The Cardinals were still wearing button up jerseys. There are not perfectly white either. I am going to guess this is from the late 1960s.
Going beyond the 1980 Lou Brock cards, looking through a few stacks of my modern cards of the Cardinals great, this is one of the better overall portrait photos of him out there.
Card back.
The little bulleted lists at the top of this card save it from complete disaster. Feels weird to make a card of a player like Lou Brock and not include stolen bases as one of the stats displayed on the card. Whatever person designed this card really did a good job with that list to save the card from the stats listed below.