Naval bar sweetheart brooch: Section Officer Rosemary im Thurn, Women's Auxiliary Air Force

Fourteen carat gold bar pin-backed brooch, with a gold, silver and seed pearl representation of a Royal Navy officer's cap badge attached to the centre. The brooch is contained in a small hinged box with domed lid, covered in blue leather with a gold tooled edge. Inside, the brooch slots into a blue velvet covered bed, while the inner lid is lined with cream satin printed in black 'ROYAL APPOINTMENT GIEVES Ltd 21, OLD BOND STREET, LONDON, W.1.'

Born at Winchester, Hampshire, England in 1917, Rosemary Belle im Thurn was one of three sisters who enlisted for service at the beginning of the Second World War. Each woman chose a different arm of service and Rosemary joined the Women's Auxiliary Air Force and became a section officer specialising in cipher work.

Rosemary's first known romantic interest was Lieutenant John Rory Carden, a pilot in the Royal Navy's Fleet Air Arm, who gave her this sweetheart brooch. Carden died on 22 December 1941 when his ship, the aircraft escort HMS Audacity, was sunk by the German U-boat 751.

Later in the war Rosemary met RAAF navigator Flight Lieutenant Mervyn Neville Austin from 456 Squadron, the only Australian night fighter squadron. The couple were married in Winchester Cathedral on 29 April 1944. They moved to Australia in 1949 and in 1952 settled in Perth where Austin had been appointed to the chair of classics and ancient history at the University of Western Australia, a position he held until 1978. Rosemary Austin died in Canberra in 2010.