"Obviously it’s not just the case itself that is a concern in a watch for extreme depths, but the sapphire crystal. Omega took inspiration from the loadbearing conical design of the viewports on the Limiting Factor submersible, using LiquidMetal, a material Omega and other brands within the Swatch Group have long utilized, for a “firm yet flexible” assembly. Omega’s patent-pending “hot bonding” technique allowed the watchmakers to avoid the use of more traditional polymer seals and thus reduce the crystal’s thickness."
"To spread the stress distribution, Omega took inspiration from this loadbearing conical design and used Liquidmetal® (a technology used by Omega to create the scales on ceramic bezels) to ensure a firm yet flexible sapphire-to-casebody assembly."