Omega Period: 1970-1979 Movement: Automatic Dial colour: Linen Case: Stainless steel Diameter: 33mm Without Crown / 35 with crown Dial: Original Omega Dial Crown: Original Crystal: Mica Strap: Leather Strap With box. We submitted Vintage Omega De ville CAL 711, Omega watch is a self-winding mechanical watch. The movement inside this watch is a calibre signed 711, which was introduced by Omega in the 1970s and was used in a variety of their watches at the time.