Cal. 561 copper-finished lever movement 24 jewels swan neck regulator the solid pink gold dial with applied pink gold baton numerals with onyx inlays pink gold dauphine hands sweep centre seconds window for date in circular water-resistant-type case with flat bezel half-hooded lugs screw back centred by the raised representation of the Geneva Observatory surrounded by a starry sky 18K pink gold Omega Reinhor brick bracelet and semi-extending clasp case dial and movement signed