In honor of the 75th anniversary of the Baseball Hall of Fame, the U.S. Mint has produced the nation's first-ever curved coin. It's a commemorative coin, which means it's not intended for circulation.

via U.S. Mint

Per the U.S. Mint, 750,000 50 cent pieces, 400,000 dollar coins, and 50,000 gold five dollar coins will be made (1.2 million coins in all). Starting March 27, they'll sell for a good deal more than their face value, with some of that money going to the National Baseball Hall of Fame.

According to the San Francisco Examiner, the curved coin took a "special act of Congress to authorize the unique design, and further federal legislation to authorize the Mint to begin the process of stamping the coins." Was it worth all the extra effort? Baseball fans and numismatists will probably think so.

The curved design is based on a French coin. It was designed by contest winner Cassie McFarland. Though she grew up in Los Angeles, she roots for the San Francisco Giants.