vintage original hat pin gold color dragon shield 18k ?

Up for auction is a lovely gold-colored hat pin. We have shined it up as best as possible. It is a dragon holding a shield! I received it at a local estate auction...I was told at the auction that it might be 18k gold on the dragon shield. Lovely no matter the metal. It is 8" in length. Nice patina...original!

Starting for a low reserve!

Thanks for looking!