Victoria Police Kings Crown Cap badge. These badges are about 50 years old. On joining the force as police officers, they were handed two badges, one cap badge, and one Helmet Plate with their own numbers engraved at the front of the badges. The colletcing challenge is to get a cap badge and a helmet plate with the same numbers. These badges are very rare and very hard to come by, if you can find the matching numbers, buy a lottery ticket.
It is hallmarked.