CORUM chronograph Les Temps Mecanique

CORUM chronograph Les Temps Mecanique reference 77.111.21, self winding, Switzerland around 1990, stainless steel/gold combined including original leather strap (has to be replaced) with butterfly buckle, screwed-down case back & winding crown, silvered dial in center engine-turned, display of hours, minutes, constant second, date & chronograph, diameter approx. 40 mm, original box & papers, condition 2, from the estate of a collector