SpecStudio
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Tudor Prince Date Hydronaut
Ref. 89190P · Diver
Stock unknown
Case
- Diameter
- 39mm
- Thickness
- 11.3mm
- Lug width
- 20mm
- Material
- Stainless Steel
- Finish
- Brushed and Polished
- Water resistance
- 200m
- Caseback
- Solid
Crystal & dial
- Crystal
- Sapphire
- Shape
- Flat
- Dial colour
- Black
- Indices
- Applied
Movement
- Caliber
- ETA 2824-2
- Type
- Automatic
- Beat rate
- 28,800 vph
ETA
The dominant mid-tier Swiss automatic workhorse, in production since 1982 and used by hundreds of brands. It runs at 28,800 vph with roughly 38–42 hours of power reserve, hacks, and hand-winds; the Sellita SW200-1 is its pin-compatible alternative.
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Retail stock & market context
Tudor on the secondhand market
+11.6%
2026 so far · +3.5% to +16.2% · 40 matched watches
+3.6% vs the index
Divers as a group: +6.3% · 305 matched watches
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In a nutshell
The Tudor Prince Date Hydronaut (ref. 89190P) is an automatic diver watch, with a 39mm stainless steel case, 11.3mm thick, powered by the ETA 2824-2 movement. Water resistance is rated to 200m, under a sapphire crystal.
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