Skip to product information
1 of 11

NB6021-17E | Promaster automatic winding

Regular price
¥80,850
Regular price
Sale price
¥80,850
Tax included. Shipping calculated at checkout.
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding
NB6021-17E | Promaster automatic winding





The legendary barnacle diver is reprinted in modern times

This is a mechanical model of the Citizen Promaster that inherits the design of the 1977 Challenge Diver. Equipped with an automatic movement with enhanced Class 2 anti-magnetic performance, it is safe even in modern life surrounded by digital devices. The retro look is recommended for discerning men.




Incredibly light titanium mechanical diver

This is a full-fledged diver's watch with a scratch-resistant and lightweight super titanium case. The urethane belt is both flexible and durable, providing a comfortable fit for both outdoor and everyday use. This is a mechanical watch that does not require regular battery replacement, so you can use it with love.


High visibility black automatic watch

This men's watch has a jet black dial with embossed indexes that create a classic atmosphere. Equipped with high-precision mechanical movement Cal.9051, it keeps stable time. The size makes it easy to fit into the cuff of a suit, making it suitable for business situations.


Titanium material model that is scratch resistant and gentle on the skin

Citizen's unique surface hardening technology Duratect Titanium Carbide has been applied to achieve a hardness approximately five times that of stainless steel. It has a metal allergy resistant specification that is less likely to cause metal allergies, so it is safe for those with sensitive skin. The lightweight and tough body supports the daily lives of active adults.













Genuine 7 Year Warranty Campaign Free Shipping Citizen Promaster Marine Series Mechanical Diver 200m Barnacle Diver Titanium Diver's Watch Automatic Men's Watch NB6021-17E CITIZEN PROMASTER MARINE Analog Black ◆Citizen PROMASTER, an authentic sports watch that combines functionality, durability, and safety. Inheriting the design of the ``Challenge Diver'' released in 1977, which was loved as the ``Barnacle Diver'', a modern updated mechanical diver's watch equipped with a reinforced anti-magnetic movement is now available. The rounded design that can be seen from the side view, the mortar-shaped bezel, and the design that follows the case width and mirror and hairline finish of the past give you a sense of nostalgia. Equipped with cal.9051, which has excellent magnetic resistance of 16000A/m by using materials that are not easily magnetized for the hairspring and surrounding parts. Although it is a mechanical watch, it has a reduced thickness and is comfortable to wear. The urethane band has a retro design with a small checkered pattern. Release date: Released in August 2022 Mechanical watch
Product number NB6021-17E
Drive method Automatic winding (hand winding)
Material: case Super titanium/Duratect titanium carbide (some exceptions)
(Silver color)
Material: belt Urethane
windshield sapphire glass
Dial color black
belt color black
Size (length x width x thickness) Approximately 49×41×12mm
Can width Approximately 20mm
Beautiful lock width Approximately 18mm
belt around arm Approximately 14.5-22cm
weight Approximately 62g
Specifications Waterproof for 200m diving
Average daily difference -10 to +20 seconds
Driving time approximately 42 hours (maximum winding)
date display
Vibration frequency: 28,800 times/hour
Number of stones: 24 stones
Second hand stop function
Quick date correction function
Magnetic resistant type 2
Luminous (hands/index)
Reverse rotating bezel
screw lock crown
accessories Warranty card/dedicated box
*As part of our efforts to address environmental issues, the instruction manual has been digitized.
Please check the included warranty for details.
Guarantee Five-year warranty from the manufacturer (Registration to MY CITIZEN required)
▼Would you like to join us?
→Size adjustment →Gift wrapping
→Name engraving/engraving →New battery replacement before shipping
・Please order together with the product.
・Some products may not be compatible with various services.
Please refer to each service page for details.