“...The 2018 Seiko Prospex Black Series – part of the collection nicknamed the “Turtles” – is a trilogy of high performance timepieces inspired by the world of night diving and built to Seiko’s stringent standards. Two of the watches in the new trio are solar powered and one – arguably the most handsome of the group – is automatic, waterproof to 200m with a screw-down crown at 4 o’clock and a generous day-date aperture at 3 o’clock.”
https://www.revolution.watch/seiko-prospex-black-series-automatic-limited-edition/