Five Royal Australian Air Force (Raaf) Insignia Auction taking the prize from the

taking the prize from the Kaiser Wilhelm der Grosse

Sergeant William Mulvey

which would have made him ineligible for service

When the Flying Corps and the Royal Naval Air Service merged to form the Royal Air Force on April 1

Five Royal Australian Air Force (Raaf) Insignia Auction taking the prize from theCorps of Signals Insignia (copper, unmarked, 37 mm x 49 mm, all four lugs intact); Cap Insignia (composed of two pieces, bronze, maker marked "WALLACE BISHOP", eagle measures 10 mm x 37. 7 mm with both screwposts intact, crown measures 9. 5 mm x 10. 3 mm with the single screwpost intact); Cap Insignia (composed of two pieces, bronze gilt, maker marked "WALLACE BISHOP", eagle measures 10 mm x 38. 5 mm with both screwposts intact, crown measures 9. 8 mm