CITIZEN Promaster NB6021-68L – Mechanical Titanium Dive Master

Built for the depths. Designed for the bold.

The CITIZEN Promaster NB6021-68L is a rugged yet refined professional-grade diver’s watch powered by mechanical movement – a rare gem in Citizen’s tool-watch family.

 Crafted in Super Titanium™ and coated with Duratect Titanium Carbide, it’s exceptionally strong, lightweight, and corrosion-resistant — ideal for serious underwater performance.

Driven by the in-house Caliber 9051, it delivers 42 hours of power reserve and an accuracy of -10 to +20 seconds per day.

The screw-lock crown, unidirectional rotating bezel, and sapphire glass all ensure it can handle demanding conditions, while the double-locking ratchet buckle ensures a secure fit during diving.

With 200M ISO-rated water resistance, luminous hands and markers, and a bold blue dial, the NB6021-68L is not just a tool — it’s a statement.

This watch is for those who seek true mechanical soul in a modern diving body.

It’s a perfect balance of craftsmanship, technology, and adventure-ready design — a true diver's companion that looks just as good on land as it performs underwater

Features & Specifications:

Model: Citizen Promaster NB6021-68L

Movement: Mechanical (automatic + hand winding)

Caliber No.: 9051

Accuracy: -10 to +20 sec/day

Power Reserve: ~42 hours (fully wound)

Case Material: Super Titanium™

Surface Finish: Duratect Titanium Carbide (silver tone)

Case Size: 41.0 mm

Thickness: 12.3 mm

Band Material: Super Titanium – triple-fold clasp with ratchet

Band Width: 20 mm

Glass: Sapphire crystal

Water Resistance: 200M / ISO-rated dive watch

Allergy Safe: Nickel-free

Magnetic Resistance: Dual-layer magnetic protection

Functions:

Date display

Quick date correction

Second hand stop (hacking)

Unidirectional bezel

Screw-down crown

Luminous hands and indexes

24 jewels

Frequency: 28,800 vph

Made in: 🇯🇵 Japan

Warranty: 1-Year Manufacturer Warranty (2 Years via My Citizen)

Included: Original box, documents – Japan licensed

Japan 100% authentic and ISO-certified.