Which is cheaper, the Airain Watches Sous-Marine or the HELM Vanuatu Titanium?

At MSRP the HELM Vanuatu Titanium is the cheaper of the two at $350, against $2,050 for the Airain Watches Sous-Marine — a $1,700 gap before any retailer discounting.

Which is bigger, the Airain Watches Sous-Marine or the HELM Vanuatu Titanium?

The HELM Vanuatu Titanium wears larger at 42mm versus 37.5mm for the Airain Watches Sous-Marine — a 4.5mm difference across the dial.

Which has better water resistance, the Airain Watches Sous-Marine or the HELM Vanuatu Titanium?

The HELM Vanuatu Titanium is rated to 300m versus 200m for the Airain Watches Sous-Marine.

Which has a longer power reserve, the Airain Watches Sous-Marine or the HELM Vanuatu Titanium?

The Airain Watches Sous-Marine carries a 68-hour power reserve against 40 hours on the HELM Vanuatu Titanium.

What movement does the Airain Watches Sous-Marine run compared to the HELM Vanuatu Titanium?

Both watches run automatic movements — the Airain Watches Sous-Marine uses the La Joux-Perret G100 and the HELM Vanuatu Titanium uses the Seiko Instruments NH35.

Airain Watches Sous-MarinevsHELM Vanuatu Titanium

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