Offered here is a circa 1924 Walter Pederson Convex-Face Mashie Niblick. Pederson thought that a convex face would allow the ball longer contact with the face of the club, which would impart additional backspin on the ball. Needless to say, convex irons did not work, and never became popular. Overall very good condition.   

This club originates from the famed Jeff Ellis Collection, and this exact club was featured in his books The Golf Club (p. 120) and The Clubmaker's Art (TCA 1, p. 246; TCA 2, p. 288). This club has not reached the collector market since its sale at the 2007 Sotheby's auction of the Jeff Ellis Collection.