Silverstone Circuit, Silverstone, Northamptonshire, UK. 27th Aug, 2021. MotoGP British Grand Prix, Practice Day; CIP Green Power rider Kaito Toba on his KTM RC250GP in the Moto3 category Credit: Action Plus Sports/Alamy
File:Chochin kabuto 10.JPG - Wikipedia
File:Antique Japanese (samurai) suji bachi kabuto.jpg - Wikimedia Commons