The classic 45.5 mm numbered edition Chrono Chime has an 18K Sedna Gold case inspired by the 2nd generation Speedmaster, the CK 2998, the first watch worn in space. The dial, in blue aventurine "Grand Feu" enamel, features an inner bezel and subdials in 18K Sedna Gold "exclusive acoustic waves". The hour markers and hour/minutes hands are in diamond-polished 18K Sedna Gold. Providing extra touches of colour on the display are red tipped dial hands and blue CVD subdial hands. The chime pusher at 8 o'clock sports a charming polished and embossed music note, while the split-seconds pusher at 2 o'clock has a red hybrid ceramic ring to mirror the look of the split seconds hand. Completing the look is a bracelet and buckle in 18K Sedna Gold. The watch's special presentation box in walnut features a resonance plate made of spruce to amplify the sound of each chime. The monumental case includes a magnifying glass to explore the watch's details, a storybook and travel bag. Providing the power is the most complicated calibre OMEGA has ever made: OMEGA's Co-Axial Master Chronometer Calibre 1932. A fully integrated chronograph and minute repeater, which fuses both functions together in one watch movement, in order to chime the elapsed time.