To start off the year, Seiko introduced a trio of limited edition Prospex Black Series, each presented in a black DLC-coated stainless steel case.

The Seiko Prospex Marinemaster Black Series SLA035 “Professional” watch comes in a 44.3 mm x 15.4 mm case (Baby Marinemaster case), is rated to 300 meters water-resistant, and is limited to just 600 pieces. This watch is powered by Seiko’s automatic caliber 8L35, operating at 4Hz with hacking, hand winding, and a power reserve of 50 hours.

Seiko Prospex Marinemaster Black Series SLA035 front
Seiko Prospex Marinemaster Black Series SLA035 front

Launched alongside the Professional dive watch was a pair of watches inside the same style of case with a slightly curved lug design, somewhat comparable to twisted lugs on a Speedmaster. The SPB125J1 “Sumo” Prospex Black Series comes with a 6R35 automatic movement that’s good for 70-hours of power reserve, inside a 45 mm x 12.9 mm diameter case and is limited to 7,000 pieces.

The SSC761J1 Prospex Black Series, which is solar-powered, comes in a slightly smaller 44.5 mm x 13.7 mm diameter case, both with 200 meters of water-resistance and made for diving. The solar-powered quartz models add chronograph functionality to the time and date of the automatic version. Both have an off-white aged lume on their hands and indices.

All three Seiko Prospex Black Series dive watches come on a black rubber accordion-style Seiko strap. Availability begins in Q1 2020.

2020 Seiko Prospex Black Series Divers
2020 Seiko Prospex Black Series Divers
Posted by:Jason Pitsch

Jason Pitsch is the Founder of Professional Watches. He specializes in reporting on the watch industry and is interested in continually learning about all aspects of watchmaking craftsmanship, history, and design.