Short for Professional Specifications, the Seiko Prospex collection has a rich and enticing backdrop to it. The world’s first Japanese diver’s watch was launched in 1965 called the Seiko 150M Diver’s 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 diver’s watch, the Seiko Prospex collection has prospered in the diving segment with finesse.