Quote:
Originally Posted by Dirt
I think you"ll find the clamping ring might be SS.
Of course, as you have mentioned the Caseback is Titanium.
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correct
The Rolex Deepsea owes its exceptional strength, waterproofness
and pressure resistance to the exclusive Ringlock system. This innovative
case architecture patented by Rolex enables the watch to resist
the massive pressure exerted by water at the depth of 3,900 metres
(12,800 feet), equivalent to a weight of approximately 3 tonnes on the
watch. Its construction is based on three elements:
a nitrogen-alloyed
steel central ring forms the backbone of the system, accompanied by a
5.5 mm‑thick, domed sapphire crystal and a case back in grade 5
titanium.