What is the value of the last coins struck at the San Francisco mint in 1955?

I'm guessing you have some sort of set that was sold as "special collectible coins" with that title. The San Francisco Mint only produced dimes and cents in 1955 and none of them are particularly rare. If the coins are uncirculated, as of 08/2014 the dime might retail for as little as $3.50 or as much as $55.00 depending on quality, while the cent would be anywhere from 35¢ to $7.00. Both ranges are actually less than prices for comparable 1955 coins from the Denver Mint.