Octopus Kraken OCT-004-B 42mm Dive Watch

Octopus Kraken OCT-004-B 42mm Dive Watch – PT5000 | Ceramic Bezel | Sapphire | 300M

The OCT-004-B is Octopus Kraken’s flagship modern diver — a 42mm 316L stainless steel case with a 120-click unidirectional ceramic bezel, sapphire crystal with AR coating, a choice of PT5000 or SW200 automatic movement, Swiss C3 Super-Luminova on all hands and indices, a helium escape valve at 10 o’clock, and a verified 300M / 30 BAR water resistance rating. Available across multiple dial variants — including the signature black dial with warm rose gold/copper-toned indices and bezel numerals, a wave-pattern blue-grey dial, and a clean silver dial — and wearable on a NATO strap, steel mesh bracelet, or solid steel bracelet depending on variant. This is the watch for buyers who want a serious, fully specified modern diver from a brand with a clear design identity and a growing collector following.

Browse the full Octopus Kraken watches collection at JwlrAddicts for all available models.

Movement Options — PT5000 or SW200

PT5000 — Chinese-manufactured automatic caliber engineered to Swiss ETA 2824-2 dimensions and specifications. Runs at 28,800 vph with hacking and hand-winding. Smooth sweeping seconds, globally serviceable, Swiss-architecture movement at an accessible price point.

SW200 — Sellita SW200, a fully Swiss-made automatic movement manufactured in La Chaux-de-Fonds, Switzerland. Runs at 28,800 vph with hacking and hand-winding. Carries the Swiss Made designation. The SW200 is the choice for buyers who specifically want Swiss movement provenance — it is one of the most respected production calibers in the Swiss watch industry and appears in watches at significantly higher price points.

Both movements self-wind through wrist motion, support hand-winding, and hack. The choice is movement origin rather than performance difference.

Key Features

• PT5000 or SW200 automatic movement — choose at order
• 300M / 30 BAR water resistance — professional dive specification
• Ceramic unidirectional bezel — 120-click precision, scratch-resistant
• Sapphire crystal with AR coating — lasting scratch resistance and glare reduction
• Swiss C3 Super-Luminova — hands, all indices for full low-light readability
• Helium escape valve at 10 o’clock — saturation diving feature
• 42mm 316L stainless steel case — 13.5mm thickness, 49.5mm lug-to-lug
• 20mm NATO strap — 200mm length (additional bracelet options available by variant)
• C3 green lume — bright green glow in darkness
• Multiple dial variants — black/rose gold, blue-grey wave, silver
• 95g weight — substantial but wearable daily
• Watch box, user manual, warranty card included

Specifications

The Black Dial with Rose Gold Indices — The Signature Variant

The most distinctive and immediately identifiable OCT-004-B variant combines a matte black dial with warm rose gold/copper-toned applied indices, hands, and bezel numerals. This colour combination sits in a specific design register — warm metallics against black create a more refined and less industrial character than the conventional white-on-black dive watch palette, while retaining full legibility and dive watch functional credibility. The rose gold tones read as contemporary luxury rather than vintage reference, making the OCT-004-B black variant suitable for contexts a conventional black diver would not — business casual, evening wear, travel. The ceramic bezel in black with matching rose gold pip and numerals creates a fully unified colour story across dial, bezel, and hands.

Dial Variants

Black / Rose Gold — the signature Octopus Kraken aesthetic. Black dial, warm rose gold/copper indices and hands, black ceramic bezel with rose gold numerals. The most distinctive and versatile of the three main variants. Ships on striped NATO strap.

Blue-Grey Wave — a wave-pattern textured blue-grey dial with warm indices, black ceramic bezel with gold numerals. The wave texture adds the same directional light interaction seen on premium diver dials. Ships on steel mesh bracelet on some variants.

Silver / White — the cleanest and most formally appropriate option. Silver dial with white and grey indices, black ceramic bezel. Maximum contrast in all lighting conditions. Ships on steel mesh bracelet on some variants.

The Helium Escape Valve — Professional Specification at This Price

The helium escape valve at 10 o’clock is a professional saturation diving feature — during saturation operations where divers live under pressure for extended periods, helium from breathing gas permeates the watch case. The escape valve vents this trapped helium safely during decompression, preventing the crystal from being forced off the case. It is a feature found almost exclusively on professional dive watches costing significantly more than the OCT-004-B. Its presence here, combined with the 300M depth rating and ceramic bezel, establishes the OCT-004-B as a watch engineered to professional diving standards rather than one dressed to look the part.

49.5mm Lug-to-Lug — Wearing the OCT-004-B

At 42mm diameter with 49.5mm lug-to-lug and 13.5mm thickness, the OCT-004-B wears as a full-size modern diver — present on the wrist, appropriate for medium-to-large wrists, comfortable for daily wear with the NATO strap configuration which distributes the weight evenly across the wrist. For buyers who find 41mm watches comfortable but 44mm+ watches oversized, the OCT-004-B at 42mm sits in the correct position. The NATO strap option — a classic pairing for professional dive watches — softens the perceived bulk compared to a solid steel bracelet, while the mesh bracelet option (available on select variants) provides a more formal alternative.

How the OCT-004-B Fits the Octopus Kraken Range

The OCT-004-B is the more modern, ceramic-bezel flagship alongside the Octopus Kraken OCT-0019 Retro Diver which covers the vintage enamel dial aesthetic at 40mm. For buyers comparing across the JwlrAddicts 300M dive watch catalog, the SteelDive SD1954 Water Ghost at 41mm with NH35 and ceramic bezel, the Phylida 300M Green Diver at 40mm with NH35, and the Seagull Ocean Star 1207 at 43.5mm with in-house movement are the closest competing specifications at similar or lower price points.

Frequently Asked Questions

What is the difference between PT5000 and SW200? Both are automatic movements running at 28,800 vph with hacking and hand-winding, engineered to ETA 2824-2 dimensions. The PT5000 is Chinese-manufactured; the SW200 is Swiss-manufactured by Sellita in Switzerland and carries the Swiss Made designation. Daily performance is equivalent; the choice is whether Swiss movement origin matters to you.

What straps are available? The standard OCT-004-B ships on a 20mm NATO strap. Select dial variants are also available on a steel mesh bracelet. The 20mm lug width accepts any aftermarket 20mm strap.

Does the helium escape valve need to be opened for regular use? No — for recreational and sport diving the helium escape valve remains closed at all times. It is only relevant during saturation diving decompression procedures.

Is C3 lume the same as BGW9? No — C3 is Super-LumiNova’s green-emitting formulation, BGW9 is the blue-emitting formulation. The OCT-004-B uses C3, which produces a bright green glow in darkness and charges quickly under light exposure.

Is the bezel ceramic? Yes — 120-click unidirectional ceramic insert. Essentially scratchproof in everyday use; the colour and markings are fired into the material rather than surface-applied.

Can I swim or dive with this watch? Yes — at 300M / 30 BAR with screw-down crown, helium escape valve, and ceramic case architecture, the OCT-004-B is rated for recreational and technical diving.