Trusty Shellback ceremony, a naval tradition that celebrates a sailor's first crossing of the equator.
The object shown is a commemorative coin featuring Neptune, the Greek-Roman god of the sea - Neptunus Rex, holding his trident and riding in a chariot pulled by sea creatures/ seahorses. "IMPERIUM NEPTUNI REGIS" meaning "Rule of King Neptune" or "Kingdom of King Neptune". A commemorative challenge coins used to commemorate naval service and traditions.
Material: IronSize: 4cm/1.57inch.
Thickness: 2.5mm/0.1inch.