Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E)
The Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E) is a current-production diver watch with a super titanium (proprietary) case, finished with duratect titanium carbide (silver). At 75 g it sits among the lighter diver watches in the guide, and is priced well under the $1,299 median for the category. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

- Type
- Diver
- Case diameter
- 41.0 mm
- Thickness
- 12.3 mm
- Origin
- Japan
- Movement
- Automatic (mechanical diver)
- Caliber
- Citizen 9051
- Power reserve
- Automatic
- Complications
- Date
- Colour
- Grey
- Surface treatment
- Duratect titanium carbide (silver)
- Finish technology
- Surface hardening
- Caseback
- Titanium
- Nickel-free
- Maker states none
- Bracelet / strap
- Polyurethane strap
- Crystal
- Sapphire
- Display back
- No
- Dial
- Black dial
- Dial colours
- Black
- Lume
- Luminous hands and markers
- Availability
- Offered
- Status
- Current
- Not published
- Reference, Lug-to-lug, Hardness, Construction, Matching bracelet
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Frequently asked questions
Is the Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E) nickel-free?
On the maker's published specification, no nickel-bearing steel touches the skin: a super titanium (proprietary) case with a titanium caseback, plus a non-steel crown and strap. That is what the guide records rather than a test of the watch, so confirm the contact points with the maker before buying if you react to nickel.
What is the case material of the Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E)?
The Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E) has a super titanium (proprietary) case with a titanium caseback. This is confirmed against the maker spec.
What size is the Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E)?
It is 41.0 mm in diameter, 12.3 mm thick, and water resistant to 200 m.
How much does the Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E) weigh?
About 75 g (w/ strap).
How much does the Citizen Promaster Marine Mechanical Diver 200m (NB6021-17E) cost, and is it available?
It is current-production and lists from $725.
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