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Arken Alterum

The Arken Alterum is a 38mm Grade 2 titanium traveler’s watch featuring a custom in-house dual-time module over an automatic Miyota movement.

The Arken Alterum is a highly functional traveler’s watch that stands out for its custom mechanical architecture. Rather than utilizing a standard off-the-shelf GMT calibre, Arken integrates a proprietary 12-hour dual-time module atop a reliable Miyota base, achieving a balanced and clean layout.

Overview

Brand: Arken
Model: Alterum
Collection: Alterum
Price: £630 GBP
Website: arken.uk

Specifications

Case Diameter: 38.0mm
Thickness: 13.0mm
Lug to Lug: 46.0mm
Lug Width: 20.0mm
Water Resistance: 200m
Case Material: Grade 2 Titanium
Crystal: Sapphire
Strap/Bracelet: Tapered Nylon Strap

Design & Wearability

Crafted from Grade 2 titanium with an anti-scratch coating, the Alterum is light and highly durable. The 38mm diameter and 46mm lug-to-lug proportions ensure excellent wearability, while the matte dials, ceramic-molded 3D indices, and clean day/night apertures deliver superb legibility.

Movement & Performance

Under the dial sits the caliber ARK-9015DT2, a custom module developed by Arken that mounts to a high-beat Miyota 9015 automatic movement. This setup displays home and local time via two standard hands with individual day/night indicators and a subdial date at 6 o’clock.

Official Website

Arken Alterum product page

Journal Coverage

FEATURES · 22 May 2026

The Arken Alterum Returns in a Striking “Sage Grey” Grade 2 Titanium Edition

UK-based microbrand Arken has brought back its highly sought-after Alterum dual-time watch in a new "Sage Grey" dial variant. Featuring a 38mm hardened Grade 2 titanium case and a custom dual-time module, the watch combines tool-watch utility with a refined new colorway.

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