Promaster Mechanical Diver 200M “Fujitsubo” Black Ref. NB6021-17E

In 1983, a barnacle-covered, Citizen Challenge Diver from 1977 was retrieved from an Australian beach. Amazingly, this watch was still operating as its case protected its movement from water and dirt.  it was still in running condition as the movement was shielded from water and dirt by its case. This surprising discovery served as the brainchild for Citizen’s newest dive watch, the Promaster Mechanical Diver 200M NB6021-17E, which is a modern take on the original 1977 dive watch. 

Citizen Promaster Mechanical Diver 200M “Fujitsubo” Black Ref. NB6021-17E

This new dive watch evokes a vintage look and has dimensions akin to the original. However, the NB6021-17E has been modernized in major areas via updated materials and technology, as well as is ISO 6425 compliant. Moreover, the NB6021-17E is completely made of Super Titanium, treated with the brand’s proprietary Duratect hardening technology. After all, Citizen was the pioneer watch manufacturer to manufacture a titanium-made watch that was commercially available in 1970. Back then, titanium was used in the space and aeronautical industries. Over time, Super Titanium, a registered trademark combining the brand’s titanium processing technologies and Duratect surface hardening process, was developed. Therefore this watch is way more scratch resistant than steel and can last for a very long time. 

The case of the lightweight NB6021-17E measures 41mm in diameter and 12.3mm in height. Although the bezel may appear a bit wider than the middle case, both have precisely the same width.The brushed finishing on the case and the polished outer surface of the bezel is also aesthetically captivating. Furthermore, the bezel has a spot-on alignment, ensuring safe diving. 

Multi-finished case

The classic black dial bedecked with rectangular indices is doused with luminous material in a retro green hue and emits a stunning glow and is visible during the day and when charged by direct sunlight. A Mercedes-style hour hand, a sword-shaped minute hand and a seconds hand that are doused with the same green glowing luminous material unambiguously indicate the time. A flat-top sapphire crystal, with a beveled edge and a domed underside covers the timepiece. The date window is located at the 3 o’clock index and is outlined in white.

A Caliber 9051 movement powers the watch by the release of a wound spring. Such an automatic mechanical movement has an oscillating weight that winds the spring with the motion of the wearer’s arm. This automatic movement operates at a frequency of 28,800vph and uses 24 jewels. It provides a decent 42h power reserve and is regulated to run within -10 to +20 seconds of deviation per day. A robust titanium caseback conceals the movement from the wearer.

Citizen’s proprietary luminous glow in the dark

Besides, the wearer can enjoy an understated elegance with the NB6021-17 that is available on a black rubber strap with a waffle-like embossing and titanium pin buckle. Not only does this watch look irresistible, it feels comfortable on the wrist and offers a resilient performance in various fields. As with the original 1977 dive watch, this watch is sure to last generations.

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