1776-1976 S Copper-Nickel Clad Variety 2 (4,149,730 p) Variety 2 Proof dollars, with their sharp and delicate reverse lettering, are lovely coins. These were included in six-piece proof sets of 1976, and feature Dennis R. Williams contest-winning reverse design, engraved by Frank Gasparro. The liberty bell design used on this coin was first seen on commemorative half dollars in 1926, and again on Franklin Half Dollars from 1948-1963.