The Ressence Type 5 | family history
The Type 5 applies the Type 3's oil-filling concept to a dive-watch brief: 100m water resistance, 46mm grade-5 titanium case, and seven internal bellows that compensate for the thermal expansion of 37.5 ml of oil as water pressure and temperature change. A dive watch that is also a technical object worth examining outside the water.
Ressence’s oil-filled diver: 46mm grade-5 titanium, 100m water resistance, 37.5 ml of oil in the upper chamber and seven bellows compensating for temperature-driven expansion. The oil-fill eliminates underwater refraction so the indications stay crisp at depth.
2015 · Type 5 launch
Ressence launched the Type 5 in 2015 as the first oil-filled dive watch. The thermal-compensation bellows system solved the problem of oil expansion under the temperature and pressure changes of actual diving. The 46mm case is large by dress-watch standards but proportionate for a diver; the titanium construction keeps the weight manageable.
How to read this family
Two honest questions for any Type 5 buyer:
- Would you actually dive with it? The Type 5 is ISO 6425-capable and the oil compensation system works. But at this price point, most owners treat it as a water-resistant sports watch rather than a working dive tool. If you want a serious working diver, a Rolex Sea-Dweller or a Panerai Submersible is a more conventional choice and easier to service. The Type 5 rewards buyers who want both a technical showcase and a capable diver.
- Type 5 or Type 3? The Type 5 is significantly larger (46mm vs roughly 40mm) and heavier. It is the sportier, more casual wear. The Type 3 is the daily-wearable option for someone who wants the oil-filled visual with a more versatile size.
Related families: Type 3 · Type 1
References in this family
Which ref to buy
The Type 5 applies the Ressence oil-immersed display system to a dive watch context: 100m water resistance, titanium case, helium escape valve. The technical challenge of a water-resistant oil-filled watch is significant.
- 1OpenRessence Type 5 · Type 5Consider
Type 5 -- oil-immersed display in a dive-rated case, technically ambitious pairing.
- The case for it:
- Making an oil-filled watch water-resistant required solving significant engineering problems. The Type 5 is the Ressence for buyers who want the display system in a more active-use watch.
- Consider instead if:
- The Type 5 is more expensive than the Type 1 and adds dive capability that most Ressence buyers will never use. For buyers who primarily want the display aesthetic, the Type 1 is the correct starting point.
Rankings last reviewed 2026-06-07. Editorial perspective only. Not financial advice.