Singapore, July 2026 — The Oris Aquis Date and Tudor Pelagos 39 represent two of the best dive watches from independent and heritage Swiss brands, respectively. The Oris delivers Calibre 400 excellence at a sub-$4,000 price point; the Tudor brings Rolex-adjacent build quality with an in-house movement. On r/Watches, this matchup pits value against prestige in the dive watch category.

TL;DR

Quick Verdict: The Oris Aquis ($2,600-3,800) offers the better value with its Calibre 400 delivering 120-hour power reserve, 5-year warranty, and 10-year service intervals. The Tudor Pelagos 39 ($4,200) brings titanium construction, 200m depth rating, and the cachet of the Tudor/Rolex family. The Oris is the smarter buy; the Tudor is the safer flex.

TL;DR
Overview
Design
Movement
Specs
Value
Pros and Cons
Verdict
FAQ

Overview

The Oris Aquis Date with Calibre 400 has transformed Oris from a respected mid-tier brand into a genuine contender against watches costing twice as much. The movement delivers 120 hours of power reserve with anti-magnetic resistance and a remarkable 10-year service interval — specs that embarrass many luxury competitors. See our Oris Aquis Date Review for the full breakdown.

The Tudor Pelagos 39 is Tudor’s refined dive watch, featuring a titanium case and bracelet for lightweight comfort, the in-house MT5400 movement, and 200m water resistance. It carries the weight of the Tudor name — a brand that shares manufacturing facilities with Rolex — and has become the thinking person’s alternative to the Submariner. For Tudor’s other dive watches, see our Tudor Pelagos vs Omega Planet Ocean comparison.

The Oris Aquis Date with Calibre 400 — incredible value with a 120-hour power reserve. Image: Oris

Design Comparison

The Oris Aquis features a distinctive rotating bezel with a ceramic insert, a boldly styled dial, and an integrated bracelet that gives it a modern, sporty look. At 41.5mm in stainless steel, it has presence without being overwhelming. The Aquis’s design has evolved significantly over recent years, with improved finishing and a more refined bracelet with micro-adjustment.

The Tudor Pelagos 39 takes a more tool-watch approach with its titanium case and bracelet, matte dial, and snowflake hands — a Tudor hallmark. At 39mm, it wears incredibly comfortably and the titanium construction makes it lighter than the steel Aquis. The overall aesthetic is more understated and military-inspired. Both watches have excellent lume application.

The Tudor Pelagos 39 — titanium construction with military-inspired design. Image: Tudor

Movement Comparison

The Oris Calibre 400 is a game-changer: 120-hour power reserve (5 full days), anti-magnetic resistance to 2,250 gauss, and a 10-year recommended service interval with a 5-year warranty. These specs match or exceed many watches at three times the price. For Oris, this movement has been transformative.

Tudor’s MT5400 is also excellent: COSC-certified, 70-hour power reserve, silicon hairspring for anti-magnetic properties, and the robust reliability you’d expect from a Rolex-affiliated brand. While the specs don’t match the Calibre 400 on paper, the COSC certification and Rolex-grade manufacturing provide absolute confidence. A NATO strap is a popular upgrade for either dive watch.

Specifications Compared

Specification	Oris Aquis Date (Cal. 400)	Tudor Pelagos 39
Diameter	41.5mm	39mm
Material	Stainless steel	Titanium
Movement	Oris Calibre 400	MT5400 (COSC)
Power Reserve	120 hours (5 days)	70 hours
Water Resistance	300m	200m
Anti-Magnetic	2,250 gauss	Silicon hairspring
Service Interval	10 years	~5-7 years
Warranty	5 years	5 years
Retail Price	~$3,200	~$4,200
Market Price	~$2,200-2,800	~$3,500-3,800

The Aquis’s ceramic bezel and refined case finishing. Image: Oris

Value and Resale

The Oris trades at 45-65% of retail on the pre-owned market, while the Tudor retains 70-85%. In terms of pure value-for-money at purchase, the Oris is hard to beat — you get a 120-hour power reserve and 10-year service interval for $1,000 less than the Tudor. But the Tudor’s superior resale makes it the better long-term financial choice. See our Tudor BB58 vs Omega Seamaster for more Tudor comparisons.

Pros and Cons

Oris Aquis Date

Pros

120-hour power reserve
10-year service interval
300m water resistance
$1,000 less than Pelagos
5-year warranty

Cons

Heavier steel construction
No COSC certification
Weaker resale value
Less brand prestige
Larger at 41.5mm

Tudor Pelagos 39

Pros

Lightweight titanium
COSC-certified movement
Compact 39mm size
Rolex-affiliated quality
Superior resale

Cons

$1,000 more expensive
70hr vs 120hr power reserve
200m vs 300m WR
Shorter service interval
Titanium scratches easier

Which Should You Choose?

Choose the Oris Aquis Date if you want the most capable movement at the best price. The Calibre 400’s 120-hour reserve and 10-year service interval are genuinely class-leading specs. It is the rational choice and the enthusiast’s darling.

Choose the Tudor Pelagos 39 if brand prestige, titanium comfort, and resale value matter to you. It’s the watch that bridges the gap between mid-range and luxury, with build quality that rivals its Rolex cousins. A rubber dive strap transforms either watch for summer. Browse all comparisons.

Frequently Asked Questions

Is the Oris Calibre 400 as good as Tudor’s MT5400?

In many ways, yes. The Calibre 400 offers a superior 120-hour power reserve vs 70 hours, and a 10-year service interval. The MT5400 counters with COSC certification and Rolex-grade manufacturing. Both are excellent in-house movements.

Which is better for diving — Oris Aquis or Tudor Pelagos?

The Oris Aquis has a deeper 300m rating vs 200m for the Pelagos 39. However, the Pelagos’s titanium case is more corrosion-resistant in saltwater. Both are excellent dive watches for recreational diving.

Does the Tudor Pelagos hold its value better?

Yes, significantly. Tudor retains 70-85% of retail vs Oris at 45-65%. The Tudor name and Rolex association create stronger demand on the secondary market.

What size wrist do you need for the Oris Aquis?

The Aquis at 41.5mm suits wrists 6.5 inches (16.5cm) and above. The Tudor Pelagos 39 fits from about 6 inches (15.2cm) and wears even smaller due to its titanium lightness.

Is Oris a luxury brand?

Oris sits at the upper end of mid-range Swiss watchmaking. With the Calibre 400, it competes on specs with genuine luxury brands like Tudor and Longines. It lacks the luxury label but delivers luxury-grade performance.

Can I swim with both watches?

Yes, both are proper dive watches rated to 200m+ and designed for water use. Both feature rotating bezels and screw-down crowns for genuine dive capability.

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This article was researched with the help of AI. While we strive to keep all information accurate and up to date, there may be errors. If you notice any discrepancies, please contact us.

Oris Aquis Date vs Tudor Pelagos 39 (2026): Calibre 400 Meets Titanium Precision