½ Dollar (San Francisco - Oakland Bay Bridge)

The Bay Bridge Half Dollar: a coin you could buy without leaving your car

In November 1936, San Francisco threw a three-day party for a bridge — and minted a coin to match. You didn't even have to park to buy one. Motorists rolled up to booths near the bridge approaches, handed over a dollar and a half, and drove off with a fresh silver half dollar still warm from the San Francisco Mint.