Scarce WW1 Era 9ct Gold RNAS Royal Naval Air Service Sweetheart Brooch 6

This is a superb quality WW1 era sweetheart brooch for the RNAS Royal Naval Air Services, it is made from and marked for 9ct gold and has been hand decorated to a very high standard, it measures 1.5 inches long and weighs 2.5 grams, it is also fitted with a gold safety chain.