The Titanium Field Guide

Citizen Attesa ACT Line (CB3010-57E)

The Citizen Attesa ACT Line (CB3010-57E) is a current-production watch with a super titanium (proprietary) case, finished with duratect titanium carbide (silver). At 87 g it sits around the middle for watches in the guide, and is priced well under the $1,445 median across the guide. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

All Citizen watchesWatch other watchesUnder $1,000Under 11 mm thickLightweightLightest, rankedOn a titanium braceletSolarWorldtimerPerpetual calendar
Price
≈$518 (¥82,500)
Material
Titanium
Grade / type
Super Titanium (proprietary)
Weight
87 g (with bracelet)
Water resistance
100 m
Type
Other
Case diameter
40.0 mm
Thickness
9.3 mm
Origin
Japan
Movement
Eco-Drive radio-controlled (multi-band)
Caliber
Citizen H128
Power reserve
Solar (about 2 years power-save)
Complications
Date, Worldtimer, Perpetual calendar
Colour
Grey
Surface treatment
Duratect titanium carbide (silver)
Finish technology
Surface hardening
Caseback
Titanium
Nickel-free
Maker states none
Bracelet / strap
Super Titanium bracelet, three-fold push clasp
Matching bracelet
Standard
Crystal
Sapphire (anti-reflective)
Display back
No
Dial
Black dial
Dial colours
Black
Lume
Luminous hands and indices
Availability
Offered
Status
Current
Not published
Reference, Lug-to-lug, Hardness, Construction
High confidence Verified Sep 2026 Source: Citizen Japan, Attesa ACT Line CB3010-57E (maker product page)
Facts are free to cite with a link.
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Frequently asked questions

Is the Citizen Attesa ACT Line (CB3010-57E) 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 bracelet and clasp. 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 Attesa ACT Line (CB3010-57E)?

The Citizen Attesa ACT Line (CB3010-57E) has a super titanium (proprietary) case with a titanium caseback. This is confirmed against the maker spec.

What size is the Citizen Attesa ACT Line (CB3010-57E)?

It is 40.0 mm in diameter, 9.3 mm thick, and water resistant to 100 m.

How much does the Citizen Attesa ACT Line (CB3010-57E) weigh?

About 87 g (w/ bracelet).

How much does the Citizen Attesa ACT Line (CB3010-57E) cost, and is it available?

It is current-production and lists from $518.

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