This is a large and impressive watch that does double duty as a genuine tide calculator. The solid 18k rose gold case is massive and 12 sided. The case features horizontal channeling on the sides, a massive screw down crown with enormous protective shoulders, a domed sapphire crystal, and a bezel that displays nautical flags and a nautical scale. Case dimensions are 42.5mm in diameter by 15mm thick.
Movement is an automatic winding Corum caliber, which is based on the highest grade ETA 2892, which Corum modifies for the tidal complications. Dial is white with three subdials related to calculating the tides, and a date display at 3 o'clock. Strap is black crocodile with an oversized Corum deployant clasp.