Short for Professional Specifications, the Seiko Prospex collection has a rich and enticing backdrop to it. The worlds first Japanese divers watch was launched in 1965 called the Seiko 150M Divers watch. It was in this era that Seiko decided to move forward in the arena of the diving world. Since the launch of the first divers watch, the Seiko Prospex collection has prospered in the diving segment with finesse.