Proper overkill
By Tom Hargreaves, Falmouth, Cornwall ยท
3,900 metres of water resistance, achieved with a thing Rolex calls the Ringlock system, a nitrogen-alloy steel ring inside the case that takes the pressure, plus a very thick sapphire crystal and a titanium caseback.
Which is impressive engineering for something you'll wear to the beach.
The numbers: 44 mm across, 17.7 mm tall, 22 mm lugs, 3235 with 70 hours, date, helium valve, steel bracelet with Glidelock and Fliplock. $14,500 to $15,050. It's a heavy lump. Under a shirt cuff, no chance. On a big wrist with a drysuit, actually rather good, because the size and the weight disappear on a big arm in thick neoprene.
I'd buy a Sea-Dweller instead, which does everything I need in a smaller case. But if you want the most overbuilt watch Rolex makes, here it is.