Oris Aquis Date Calibre 400 review: worth it or skip?

Buy8.2/10 research score

Quick answer

Buy it, if you want value in-house. Why: in-house 5-day movement diver. The catch: less prestige.

By Opulique Editorial Team Updated November 6, 2026 1 min read

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Our verdict on the Oris Aquis Date Calibre 400

Buy it if: you want value in-house.
Skip it if: you want prestige.

Best for: Value in-house
Key feature: In-house 5-day movement diver
Typical price: $3,300–$3,800

Check Price on Amazon Paid link

Key specifications

Case	41.5 mm steel
Movement	Oris 400
Water resistance	300 m
Power reserve	120 hours

Who should buy it, and who should skip it

A good fit if you

you want value in-house
value 5-day reserve
can spend around $3,300–$3,800

Skip it if you

you want prestige
mind this: less prestige

Pros and cons

Pros

5-day reserve
10-year warranty

Cons

Less prestige

The verdict in one breath

The Oris Aquis Date Calibre 400 is a luxury dive watch we would point many buyers to. What earns it the buy: in-house 5-day movement diver. In our list it is the pick for: value in-house.

Reasons to buy

5-day reserve
10-year warranty

Reasons to skip

Less prestige

The details that matter

Case: 41.5 mm steel
Movement: Oris 400
Water resistance: 300 m
Power reserve: 120 hours

Worth knowing

10-year warranty.

Buy it or skip it?

Buy it if you want value in-house. Skip it if you want prestige; the TAG Heuer Aquaracer Professional 300 is the better buy then. Everything else is in our list of the best luxury dive watches.

Alternatives worth considering

TAG Heuer · Luxury dive watches

TAG Heuer Aquaracer Professional 300

Buy it if you want an entry luxury diver.

Verdict: Buy
Best for: Entry luxury
Typical price: $3,300–$3,800

Pros

Fair price
Tough

Cons

Sellita movement

Check Price on Amazon Paid linkRead our review

Longines · Luxury dive watches

Longines Legend Diver

Buy it if you want vintage style.

Verdict: Buy
Best for: Vintage compressor
Typical price: $2,900–$3,500

Pros

Distinctive
Heritage

Cons

Crown operated bezel

Check Price on Amazon Paid linkRead our review

Frequently asked questions

Should I buy the Oris Aquis Date Calibre 400?

Buy it, if you want value in-house. Why: in-house 5-day movement diver. The catch: less prestige.

When should I skip it?

Skip it if you want prestige. The TAG Heuer Aquaracer Professional 300 is the better buy then.

What does the Oris Aquis Date Calibre 400 cost?

Usually $3,300–$3,800 in the US. Luxury houses raise prices often, so check the current price before you buy.

Opulique Editorial Team

Part of the Opulique research team. We compare specifications, documentation and real-world trade-offs so you can decide faster.

How we research products Editorial policy

Oris Aquis Date Calibre 400: the full buy-or-skip review

Is the Oris Aquis Date Calibre 400 worth the money? Short answer: buy it, if you want value in-house. This review explains what this Oris piece gets right, where it falls short, what it usually costs and which luxury dive watch to buy instead if it is not right for you.

What the Oris Aquis Date Calibre 400 does well

The headline: in-house 5-day movement diver. The details: Case: 41.5 mm steel; Movement: Oris 400; Water resistance: 300 m; Power reserve: 120 hours. In our list it is the pick for: value in-house. It usually sells for $3,300–$3,800 in the US.

10-year warranty.

The trade-offs

Good: 5-day reserve, 10-year warranty. Not so good: less prestige. Read the skip-if line before you spend: skip it if you want prestige.

What to buy instead

Instead, consider the TAG Heuer Aquaracer Professional 300 ($3,300–$3,800): steel diver with ceramic bezel. Better if you want an entry luxury diver.

Instead, consider the Longines Legend Diver ($2,900–$3,500): inner rotating bezel diver. Better if you want vintage style.

Instead, consider the Bell & Ross BR 03-92 Diver ($4,000–$4,800): square case diver. Better if you want square.

Before you buy

Size: 39 to 42 mm wears well on most wrists; check lug-to-lug length, which matters more than diameter. Movement: in-house and chronometer-certified movements (COSC, METAS) are more accurate and often have longer service intervals. Bracelet: a quick micro-adjust clasp makes a huge difference in summer; check it before you buy.

Buyer tip

Buy luxury watches from authorized dealers or the brand for the full warranty; grey-market and pre-owned sellers can save 10–30% but check their warranty.

Buying in Europe: authorized-dealer prices for Swiss watches are set per country and include VAT; a watch bought in Switzerland or the EU carries the same international warranty as one bought in the US. Grey-market and pre-owned prices are often quoted in euros or Swiss francs.

Luxury prices move in a different rhythm from everyday shopping. The great houses (Chanel, Hermès, Louis Vuitton, Dior, Rolex) raise prices once or twice a year, often in January and in spring, and almost never discount their icons. Seasonal pieces, colors and many shoes, coats and knitwear drop 30–50% in the end-of-season sales in January and from late June. Watches from brands such as Omega, TAG Heuer, Longines and Breitling, and most fragrance, see the best prices around Prime Day and Black Friday. Judge any deal against the usual price we show.

Buy from the fashion house, an authorized retailer or a reseller that authenticates and guarantees every piece, and keep the receipt, the dust bag, the box and any warranty card: they matter for repairs and for resale. Swiss watches carry a 2- to 5-year international warranty when bought from an authorized dealer, and buyers in the EU and UK also have a legal guarantee of at least two years on new goods.