Saying that Seiko’s most accurate watch is any Grand Seiko Spring Drive ... The new Astron’s astonishing accuracy isn’t limited to real-time. It is equipped with a 1/20th-second chronograph ...

The white and black/gold versions ... these Seiko Prospex timepieces are powered by a 6R35 movement, which features a lengthy 70-hour power reserve. And like any real dive watch, they can hold ...