Here's an oddball set put out in 1990 by Ban Dai. The set consists of 50 brass coins. The coins are pretty large for coins, about 1¾" inches in diameter. Ban Dai went big, getting a license from both MLB and the players.
There's the checklist on the back of the package. You can see how many you'll need to get your team's set. I had four Cubs to chase and it was not too difficult.