The limited-edition Valgrine S.T. Dupont putter (www.valgrine.com) features an alligator-scale pattern carved into the club’s face and is accentuated with Chinese enamel work and palladium-finished rings and screws. The golf-club manufacturer Valgrine, which was founded two years ago in Saint Etienne, France, specializes in bespoke putters rendered in a range of materials, styles, and finishes. S.T. Dupont is a 141-year-old Parisian design house known for its fine lighters and writing instruments. The blade-style putter is priced at $25,000.