Can anyone please help me? I found a gold coin previosly owned by my grandmother. It has a necklace attatchment on it, a picture of man on horseback slaying a dragon. date 1908. on the back it reads edwardvs v11 d.g britt omn rex f.d ind imf but over the head it is engraved "PEACE 1919" Can anyone tell me what this is? i'd be very gratefull, many thanks Beccy