Oris Aquis Date Calibre 400vsHELM Vanuatu

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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Aquis Date Calibre 400

Vanuatu
Diameter
41.5mm
42mm
Lug-to-Lug
n/a
50mm
Thickness
n/a
14mm
Water Resistance
300m
300m
Power Reserve
120h
highest
40h
MSRP
$5,150
$285
lowest
Movement
Oris Calibre 400
Seiko NH35
Case
5 specsCrystal & Dial
5 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners and reviewers widely praise the Oris Aquis Date Calibre 400 for its exclusive in-house Calibre 400 movement, which offers a five-day power reserve, impressive accuracy, and a 10-year warranty. The 41.5mm steel case is considered universally appealing, and the watch features a refined bezel and dial markers for improved ergonomics. Some reviewers note the dial can be shiny with glare from the domed crystal, and one owner reported their watch running 7 seconds fast per day after a few months. Overall, owners and reviewers rate the Oris Aquis Date Calibre 400 highly for its in-house movement and wearability at its price point.
The 5-day power reserve of the Calibre 400 movement is a significant strength. No shared weaknesses were identified.
HELM Vanuatu owners widely praise its exceptional comfort and value, with many highlighting its less overbearing feel on the wrist compared to other dive watches. The titanium bracelet is frequently cited as a key comfort feature, described as "uber-comfortable." Owners also note a great bezel and overall impressive quality for the price. On balance, owners rate the HELM Vanuatu highly for its comfort and perceived quality at the price point.
The case finishing is consistently praised. The bracelet is noted as having significant rattle.
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