From the Google AI Overview:

The "1972 Topps Winners" refers to a special promotion where Topps Baseball gave away sealed boxes of 1972 Topps baseball cards to 25 randomly selected winners. Each winner received a box containing wax packs of cards, and one of the cards in each pack was a special "Winners" card featuring their name. These winners also received 1,000 additional cards featuring their name to distribute.
Here's a more detailed explanation:

The Promotion:
Topps ran a contest where they randomly selected 25 people to receive a prize.
The Prize:
Each winner received a sealed box of 1972 Topps baseball cards, with a unique
"Winners" card inserted into each pack.
The "Winners" Card:
This card featured the name of the individual winner, making it a personalized
collectible.
Additional Cards:
Winners also received 1,000 additional cards featuring their names.
Limited Availability:
Only 19 of the 25 known "Winners" cards have been identified, and one is being
auctioned.