1771 Machins Mills Halfpenny. Vlack 2-71A, W-7670. Rarity-4. GEORGIVS III, Group I. Fine Details--Environmental Damage (PCGS). 113.5 grains. Rather glossy medium brown and chocolate surfaces with some underlying roughness and verdigris behind the head. Nicely detailed with all of the significant detail bold. PCGS# 826934. <strong>To view supplemental information and all items from the Sydney F. Martin Collection, click<a href="https://stacksbowers.com/sydney-f-martin-collection/"target=’_blank’> here.</a></strong> From the Sydney F. Martin Collection. Earlier ex Jim Skalbe at the August 2006 ANA Convention.