The Seiko Prospex Zimbe 12 Phytoplankton Limited Edition 44mm (Ref. SPB109J1) continues the Thailand domestic market conservation series supporting whale shark protection through 1,200-piece production, doubling the Zimbe 11 allocation whilst the sunray green dial with gold baton hour markers and gold inner dial creates distinctive phytoplankton-inspired character unique within the MM200 family. The Zimbe name references the Japanese word Jinbei for these remarkable ocean creatures that phytoplankton sustains throughout the marine ecosystem.

At 44mm with 13.1mm thickness through Diashield-coated stainless steel construction, this provides substantial diving watch presence whilst the sapphire crystal with anti-reflective coating and cyclops date magnification at 3 o’clock ensures practical daily readability. The LumiBrite on hands and indexes provides reliable visibility during diving whilst the unidirectional elapsed time bezel enables precise underwater timing.

The Calibre 6R15 delivers reliable 50-hour power reserve through automatic construction with manual winding capability, stop seconds function, and magnetic resistance ensuring dependable professional diving performance. The Made in Japan designation reflects Seiko’s commitment to domestic manufacturing quality whilst the screw-down crown and 200m water resistance validate genuine diving capability.

The double-lock clasp with push-button release and hinge extension for diving accommodate wetsuit wear whilst the included polyurethane rubber strap provides a practical alternative option. The collector’s set of 12 Zimbe coasters provides additional collectability within the conservation series. The green sunray dial with gold detailing and phytoplankton theme gives the Zimbe 12 its own identity within the conservation series, backed by the same proven MM200 specification throughout.