Few tool watches manage to achieve that heady space of voguish collectability, occupied by brands like Rolex and Omega, while remaining accessible to the common man. The sheer number of models, references, and price points—all products of function-first design, upholding and surpassing the ISO 6425 standards—mean that somewhere in the Seiko catalogue there is a dive watch waiting for you.
The Turtle, released in 2016, is essentially a reissue of the 6309--a watch produced by Seiko for 12 years during the 70s and 80s. The Samurai, while officially released as part of the Prospex Series in 2017, has been around in various forms since 2004...Both are serious divers. Both are excellent value propositions.