The Omega Seamaster De Ville Reference 136.020 is a highly regarded mid-century timepiece, first introduced around 1962. This specific configuration, featuring a solid 18k gold case and the manual-wind Caliber 611, represents a premium dress-watch variant from an era when the "Seamaster" and "De Ville" lines were still unified.

 The Caliber 611 was part of Omega's reliable 600-series family and was produced between approximately 1962 and 1967. It is known for its durability and precision, featuring an excenter regulator for fine-tuning accuracy. Notably, the date on this caliber is adjusted by cycling the hands between 9 PM and midnight (semi-quickset), as it lacks the modern pull-push quickset found in later calibers like the 613.