Zelos · Microbrand · Singapore
Zelos Hammerhead Chrono 1000m Diver SS
- ETA Valjoux 7750
- 44 mm
- Sapphire crystal
- 1000 m water resistance
Where to buy
- Zelos (Black Sand)Worldwide
- Zelos (Meteorite)Worldwide
- Zelos (Midnight Blue)Worldwide
Movement
- Caliber
- ETA Valjoux 7750
- Type
- Automatic
- Tier
- Upper
- Complications
- Hours, Minutes, Small seconds, Chronograph
- Frequency
- 28,800 bph
- Power reserve
- 54 h
- Hacking
- Yes
- Accuracy (factory)
- —
- Grade
- Elaboré
- Modifications
- Custom skeletonised, PVD-coated rotor
Case
- Diameter
- 44 mm
- Lug to lug
- 48 mm
- Thickness
- —
- Lug width
- 22 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 1000 m
- Crown
- Screw-down
- Case back
- Display
- Bezel
- Unidirectional, 120 clicks, 60-minute dive, lumed
- Finishing
- Alternating brushed and sandblasted
- Helium valve
- Yes
Crystal & dial
- Crystal
- Sapphire
- Shape
- Double-domed
- Anti-reflective
- Inner
- Lume
- Super-LumiNova C3 X1 and BGW9 (subdials, hands, indices, tachymeter ring, bezel and crown)
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- —
- Solid links
- —
- Link attachment
- —
- Taper
- —
- Quick release
- —
- Half links
- —
- Clasp
- —
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- Rubber, Custom Zelos rubber strap, included with the bracelet
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
Variants
| Name | Dial | Bezel |
|---|---|---|
| Black Sand | black (sand texture), gilt indices and hands | Black ceramic insert |
| Meteorite | grey (meteorite) | Meteorite insert |
| Midnight Blue | blue (fumé) | Blue ceramic insert |
About this entry
63% of key specs known. Missing: thickness, weight, hardening, bracelet links, end links, link attachment, clasp micro-adjust.
Zelos's first Hammerhead chronograph, listed on 3 March 2020 in 316L steel or CuSn8 bronze (separate models), each in Black Sand, Meteorite and Midnight Blue; all six listings are in Zelos's Discontinued Models collection. Swiss Valjoux 7750 in Elaboré grade with a custom skeletonised PVD rotor behind a sapphire display back. No day or date window (photos; SeriousWatches lists "Date: No"): 30-minute counter at 12, small seconds at 9, 12-hour counter at 6, internal tachymeter ring. Case 44mm, 48mm lug to lug, 22mm lugs, 1000m with a helium escape valve at 9 o'clock, screw-down pushers and a screw-down crown with a double gasket. Zelos gives the height only as "18mm (without crystal)", so total thickness with the double-domed sapphire is not recorded (SeriousWatches lists 18mm). Finishing: the product pages say alternating brushed and sandblasted, the collection page says alternating brushed and polished edges. 120-click unidirectional bezel with a black or blue zirconia ceramic insert (Zelos: 1500Hv) or, on the Meteorite, a meteorite insert under clear epoxy. Fully lumed subdials, hands, indices, tachymeter ring, bezel and crown in C3 X1 and BGW9; inner AR coating. This file is the 316L steel case, which Zelos's collection page says comes with both the rubber strap and a matching 316L steel bracelet (the product pages list only the rubber strap; the photos show both). Bracelet construction and clasp not described. Weight not published.
Last verified: 2026-10-21. Edit or correct this entry.
Sources
- Zelos Hammerhead Chrono 1000m Diver SS Black Sand (product page; the other listings carry the same specs) accessed 2026-10-21
- Zelos Hammerhead Chronograph 1000m Diver collection page (full description) accessed 2026-10-21
- Zelos Discontinued Models collection (lists all six Hammerhead Chrono listings) accessed 2026-10-21
- SeriousWatches (Zelos retailer), Hammerhead Chrono Steel Black Sand spec table accessed 2026-10-21