MPX5060542: Launch of H.M.S. Devonshire. October 1927. HMS Devonshire was a County-class heavy cruiser of the Royal Navy that served in World War II. She was laid down at HM Dockyard at Devonport in Plymouth on 16 March 1926, launched on 22 October 1927 and completed on 18 March 1929. Devonshire's primary weaponry consisted of 8 inch (200 mm) guns. P000029 / Bridgeman Images