The Titanium Field Guide

Arken Alterum

The Arken Alterum is a current-production integrated bracelet watch with a grade 2 (treated) titanium case, finished with blasted. At 72 g it sits among the lighter integrated bracelet watches in the guide, and is priced well under the $14,000 median for the category. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

All Arken watchesWatch integrated bracelet watchesUnder $1,000MicrobrandLightweightLightest, rankedOn a titanium braceletGMT
Price
≈$859 (£630)
Material
Titanium
Grade / type
Grade 2 (treated)
Weight
72 g (with bracelet)
Water resistance
200 m
Type
Integrated bracelet
Case diameter
40.0 mm
Thickness
13 mm
Lug-to-lug
46 mm
Origin
United Kingdom
Movement
Automatic (dual-time)
Caliber
Arken ARK-9015DT (Miyota 9015 base)
Power reserve
42 h
Complications
GMT
Colour
Grey
Surface treatment
Blasted
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Maker states none
Bracelet / strap
Titanium (integrated) / nylon
Matching bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Grey / multiple
Dial colours
Grey
Lume
Super-LumiNova BGW9
Availability
Offered
Status
Current (pre-order; delivery Q4 2026 to Q2 2027)
Not published
Reference, Hardness, Construction
High confidence Verified Sep 2026 Source: Arken
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Frequently asked questions

Is the Arken Alterum nickel-free?

On the maker's published specification, no nickel-bearing steel touches the skin: a grade 2 (treated) titanium 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 Arken Alterum?

The Arken Alterum has a grade 2 (treated) titanium case with a titanium caseback. This is confirmed against the maker spec.

What size is the Arken Alterum?

It is 40.0 mm in diameter, 13 mm thick, 46 mm lug to lug, and water resistant to 200 m.

How much does the Arken Alterum weigh?

About 72 g (w/ bracelet).

How much does the Arken Alterum cost, and is it available?

It is current-production and lists from $859.

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