Vintage 60's BUCO DEFENDER Motorcycle Half Helmet Chopper Bobber Scooter 1960’s BUCO; DEFENDER White Ear flaps TAN COLOR Chin strap. Patent NO. 3,137,859 Size, Approx. measurements: *inside circumference 24in (60.96cm)*adjustable liner. Exterior ; helmet has some scuffs but no cracks to actual helmet. Minor rust on rivets. Interior ; Adjustable , minor curling on leather, overall integrity is VERY GOOD!!