**\[WTS\] Omega Constellation 167.021 Ultra-Thin Cal. 712 Chronometer – Super Clean (c. late 1960s)** Up for sale is an Omega Constellation 167.021 powered by the legendary ultra-thin, chronometer-rated Calibre 712. At just 7.5 mm thick and 33 mm across, this is one of Omega’s most elegant vintage designs — a true feat of engineering that remains underappreciated compared to pie-pans and dog-legs. **Why it’s special:** * Houses the Cal. 712 — still the thinnest automatic chronometer Omega has ever produced (only 3 mm thick). * Designed in collaboration with Blancpain/Edward Piguet for Omega, making it as historically significant as the Cal. 321 Speedmaster. * Wears larger than its 33 mm size thanks to the ultra-thin bezel and flat case profile. * Represents a high point of Omega’s 1960s watchmaking: chronometer precision, slim elegance, and water resistance in a refined package. * Still chronically undervalued compared to other Constellation references, making it a real collector’s opportunity. **Condition:** * Exceptional for a vintage watch — super clean example * Case has never been polished * Dial and crystal in almost perfect condition, tiny nick at 7 o'clock * Running perfectly, keeping time within \~1 min/day * Service history unknown, comes with Omega travel case. **Details:** * Reference: 167.021 (Omega database also lists as 167.0021) * Case: Stainless steel, 33 mm * Movement: Omega Cal. 712 automatic chronometer * Lug width: 19 mm **Price:** €1000, or equivalent currency **Shipping:** Europe and UK, can ship within EU. **Location:** Switzerland **Timestamp**: in album above.