This series has a dolphin icon engraved on the caseback and is affectionally known as Orient Mako, and since its launch in 2004 the model has been released in a wide variety of dial colours and details.

A distinctive characteristic of the limited-edition 20th anniversary model is the blue dial. The dial features Arabic numerals, a design signature of Diver design models since its launch in 2004. The blue gradation from 12 o’clock to 6 o’clock represents the beautiful ocean that surrounds Japan, while the dial’s stamped wave pattern, coupled with the words “Anniversary Edition” at 4 o’clock and spectacular gold-coloured hands, highlight the celebratory feel of the 20th anniversary model.

The stainless steel case’s screw case-back and screw down crown provide water resistance to 20 bar, while inside is the reliable automatic (with hand winding) mechanical in-house calibre F6922 that offers stable accuracy of +25 seconds to –15 seconds per day and power reserve of 40 hours, making this an excellent practical watch for a variety of scenes from the outdoors to the city.