1978 United States Proof Set, 5 Coins Inside. Though it is the last Proof Set to contain an Eisenhower Dollar (which is also the last full-sized Dollar produced by the U.S. Mint), the 1978-S Proof Set remains affordable. However, expect this to change over time, as more and more sets are broken up for individual, high-quality examples and for the Proof-only coins that make up this set.Each set contained six coins: One example each of the Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, Kennedy Half Dollar, and Anthony Dollar.About the sets: Beginning in 1978, all Proof coins were struck with Cameo or Deep Cameo Finishes.