WW1 Royal Naval Air Service Officers Dress Cap. A First World War Royal Naval Air Service Officers cap. The Royal Naval Air Service (RNAS) was the air arm of the Royal Navy, under the direction of the Admiralty's Air Department, and. Existed formally from 1 July 1914 to 1 April 1918, when it was merged with the British Army's Royal Flying Corps to form the Royal Air Force (RAF). The cap is of black felt with leather brim and strap.The cap carries the officers badge of the Royal Naval Air Service (RNAS) that of a bullion embroidered crowned wreath with silvered. Eagle in flight to the front above the brim. The cap has a silk lining and a tan leather sweat band. The interior has a makers label for George Varcie (or Varcis) & Son of Fenchurch St, London. The cap has an inner circumference of approximately 56cm (22 inches). The cap is in a lovely condition with only some very light wear in parts and very light deterioration to the leather strap as to be. Expected for a piece of this age. The cap badge has some wear to the velvet parts but is otherwise in very good order. The item "WW1 Royal Naval Air Service Officers Dress Cap" is in sale since Wednesday, May 29, 2019. This item is in the category "Collectables\Militaria\World War I (1914-1918)\Helmets/ Hats". The seller is "theantiquesstorehouse" and is located in Portsmouth, Hampshire. This item can be shipped worldwide.