ARSA 18k pink gold Valjoux 72C complete calendar chronograph, Switzerland around 1950, manual winding, 3-piece construction case dent, snap on bezel & case back, stepped lugs, silvered duoton-dial patinated with gilded indices, day & month at 12, central date, pink gilded original hands, pink gilded movement calibre, 18 jewels, glucydur-balance with Breguet-hairspring, diameter approx. 35 mm, condition 3