1955 Proof Sets appeared in two different versions. Early in the year, sets were sold in old-style packaging consisting of cellophane sleeves, tissue paper, and boxes. Later in the year, the Mint converted to a new "flat pack" in which the coins were placed in a clear pliofilm holder. Each coin "floated" loose in its own separate, sealed compartment. A sixth compartment held a small octagonal foil seal, imprinted with "US MINT PHILADELPHIA" in blue. The set was then inserted, along with a card, into an imprinted mailing envelope. The price remained the same for either version. In keeping with the trend of prior years, sales of the 1955 Proof sets took another big jump.
Each set contained five coins: One example each of the Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, and Benjamin Franklin Half Dollar.
Mintage: 378,200 sets