I have for sale my rare Omega Seamaster Professional Chronograph in 18K Rose Gold/Titanium/Tantalum, reference 2296.80. The bezel insert, crowns and pushers are rose gold. The bezel is tantalum. The case is titanium. It has a dark blue dial. My SMPc is about 42 mm in diameter. Water resistant to 300m. This watch is in excellent 90% condition. No issues, runs great.

My SMP Chrono comes on the Omega 18K RG/Titanium/Tantalum  bracelet.
Mostly titanium, thin rose gold pieces with tantalum between the thin rose gold parts,

Here's the rear view.

The lume.

This package includes double boxes, manuals, warranty card, chronometer certificate and extra half link.