Seiko Prospex Tuna Can

Seiko's Prospex diver's watch with the nickname “TUNA CAN” or "TUNA", this collection of diver's watches are symbolized with a heavy-duty outer ring to protect the bezel and the case of the watch, the shape of the ring when you look upon it from the top is just like an opened tuna fish can. 

Even though not all of these watches are fall within the product range of Marine Master,  eveyone of these "TUNA CANs" are equipped with professional scuba diving capabilities and specifications, they are all loved by divers and professional adventurers all over the world since 1975, thus making this series one of the most successful goldies but oldies in Seiko's watchmaking history.