File:Calthorpe 350 cc 1929.jpg - Wikimedia Commons
motormobilia - Calthorpe Motorcycle Photo Typ 250ccm 2 Stroke 1925
Male Motorcycle rider posing with a Calthorpe racing bike, No. 15, city street setting, ca. 1935, State Library of New South Wales, ON 388/Box 044/Item 249 https://archival.sl.nsw.gov.au/Details/archive/110620631 Stock Photo - Alamy