OMEGA Speedmaster Chrono Chime

Omega's Speedmaster Chrono Chime, reference 522.50.45.52.03.001, measures 45 mm in rose gold. The case stands 17.27 mm thick with a lug-to-lug span of 53.5 mm, and the blue dial sits under a sapphire crystal treated with anti-reflective coating on both sides. This is a chronograph, and one of the most complex Omega has built: calibre 1932 is a Master Chronometer combining a chronograph with a minute repeater, also carrying small seconds and a tachymeter scale. It is chronometer certified. Power reserve runs to 60 hours. A display back shows the finishing on the movement. The rose gold bracelet closes with a foldover butterfly clasp. Water resistance is limited to 30 metres, modest given the complications packed inside.