Amazon.com : 241.3MM 4.5 WOLLENSAK Series II VELOSTIGMAT
Amazon.com : 241.3MM 4.5 WOLLENSAK Series II VELOSTIGMAT,The Wollensak Velostigmat Series II,Wollensak Velostigmat Series II F4.5 Focus 71/4,M42 MOUNT SPIRAL: Wollensak,Amazon.com : 241.3MM 4.5 WOLLENSAK Series II VELOSTIGMAT