Arken · Microbrand · United Kingdom
Arken Alterum
Movement
- Caliber
- Miyota 9015
- Type
- Automatic
- Tier
- Mid
- Complications
- Hours, Minutes, Seconds, Date, GMT
- Frequency
- 28,800 bph
- Power reserve
- 42 h
- Hacking
- Yes
- Accuracy (factory)
- -10 / +30 s/day
- Modifications
- Arken ARK-9015DT2 proprietary dual-time module: a second, independently set 12-hour hand with AM/PM indicators for both zones, and a pointer date at 6 set by a screw-down pusher at 4
Case
- Diameter
- 38 mm
- Lug to lug
- 46 mm
- Thickness
- 13 mm
- Lug width
- 20 mm
- Material
- Titanium (Grade 2)
- Hardening
- Anti-scratch treatment, on case
- Water resistance
- 200 m
- Crown
- Screw-down
- Case back
- Solid, screw-down
- Bezel
- —
- Finishing
- Brushed
Crystal & dial
- Crystal
- Sapphire
- Shape
- Flat
- Anti-reflective
- Inner
- Lume
- Super-LumiNova BGW9 (solid applied indices)
Bracelet
- Bracelet
- Not offered
Straps
- Strap 1
- Nylon, quick release, Case-fit tapered nylon strap with titanium tang buckle
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| All | — | Msrp | 630 GBP | $840 | 2026-10-24 | link |
Variants
| Name | Dial | Status |
|---|---|---|
| Black | black | Discontinued |
| Anthracite Grey | grey | Discontinued |
| Sage Grey | green-grey | — |
About this entry
93% of key specs known. Missing: weight.
Arken's second model, a titanium dual-time watch introduced in 2023 with black and grey (Anthracite Grey) dials, first in a run of 200 per colour, then a restock and an open-ended run that ended in 2025 (Fratello); the store now says the Black and Anthracite versions "will no longer be available online". Sage Grey, a green-grey dial with a sand-coloured second hour hand and green strap, replaced them as the standard version in 2026: a small batch in stock went on sale on 23 May 2026, then an open pre-order with deliveries expected Q4 2026 to Q2 2027. The pre-order window was closed and every colour out of stock on 2026-10-30, at £630 (Fratello also quotes €730 / US$850). Arken has also made limited and event-only versions (a 60-piece Year of the Dragon edition in 2025, "Speakeasy" colourways sold only at meet-ups), not recorded here. The ARK-9015DT2 is Arken's module on a Miyota 9015 (28,800vph, 42h, 24 jewels, hacking): two independently set 12-hour hands rather than a 24-hour GMT hand, day/night indicators (left for local, right for home), and a pointer date at 6 corrected by the pusher at 4; the first-generation ARK-9015DT had a non-functional crown position that the DT2 removes (aBlogtoWatch). Dimensions from the brand's drawing: 38mm, 46mm lug to lug, 13mm thick, 20mm between the lugs; aBlogtoWatch agrees, while Fratello describes a 40mm case with a 38mm sloping bezel and an 18/16mm strap. Grade 2 titanium per aBlogtoWatch. Screw-down crown, date pusher and case back; flat sapphire with AR on the underside; 200m. Applied indices of solid BGW9 Super-LumiNova (3D-printed on the first versions, moulded from a luminous ceramic material on Sage Grey); the minute track and hands are lumed too. Weight not published.
Last verified: 2026-10-30. Edit or correct this entry.
Sources
- Arken, Alterum product page (specification, dimension drawing, price) accessed 2026-10-30
- aBlogtoWatch, Arken Alterum Sage Grey review (27 June 2026) accessed 2026-10-30
- Fratello, Hands-on with the Arken Alterum Sage Grey (3 June 2026) accessed 2026-10-30