found:Work cat.: Kightly, J. The Supermarine Walrus & Stranraer, 2004:p. 7 (the Walrus was the most successful of a long line of single-engine flying boats and amphibians produced by Supermarine) p. 11 (the Royal Australian Air Force received the Seagull V; it was then ordered for the Royal Navy, to be named Walrus rather than Seagull V for no clear reason)
found:Fleet Air Arm Archive web site, 7 July 2005:index of naval aircraft (Supermarine Walrus/Supermarine Seagull; catapult-launched biplane amphibian with pusher propeller developed from the Seagull; the Seagull V became the production model for the RAAF, it was then redesignated as the Walrus for service with the RAF and FAA)