1955 Flat Proof Set OGP

The 1955 Proof Set is a collection of proof coins minted by the United States Mint for collectors. Here are some key details about the 1955 Proof Set:
- The 1955 Proof Set typically includes one example of each regular-issue coin in circulation at the time. This usually consists of the Lincoln Wheat Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, and Franklin Half Dollar.

- Proof coins are special coins minted with a high degree of detail and craftsmanship. They are struck multiple times with specially polished dies, resulting in sharp, mirror-like surfaces, frosted design elements, and excellent detail.

- The mintage of proof sets can vary from year to year. The 1955 Proof Set had a mintage of over 378,200 sets, making it relatively common among proof sets of that era.

- The 1955 Proof Set is the first year that Proof coins were packaged as a set, rather than in individual cellophane sleeves. They were sold in cellophane flat-pack.