The boat is a John Alden-designed daysailer modified for the Nantucket waters, and at the direction of the Nantucket Yacht Club in the late 1920s.
BTW this is one of two remaining original wooden boats from that 1928 fleet. Quaise was restored by Rick Waters, Noank, CT in 1989. He just refastened all planks (3,500 silicon bronze screws!) in 2012.