Proof Walking Liberty Half Dollars were only struck for 7 years, from 1936 to 1942, with only 74,400 examples minted in total. Even the lowest mintage key date circulation Walking Liberty Half Dollar had a mintage of 208,000 examples, which is almost three times the number of total Proof Walkers struck! This set includes 2 Proof Walkers, struck in 1940 and 1942 with mintages of 11,279 and 21,120 coins respectively. Each of the two coins offered here are graded in Proof 66 condition. With so few Proof Walkers ever produced, only a select few will be able to add them to their collections.