1.3? Across- One of the Earliest Dollar Sized Depictions of the Space Program- Launched 1-31-58. The Explorer 1 1958 Bronze Commemorative Medal Token Coin is a valuable collectible item issued by the U.S. Mint to commemorate the launch of the first U.S. satellite. Made of bronze, this medal serves as a tangible reminder of the historic event that took place in 1958. As a piece of exonumia, this token holds significance for collectors and history enthusiasts alike, encapsulating a pivotal moment in American space exploration.