making the Constellation for more than 70 years, a watch that was the Swiss brand's elegant flagship timepiece before the Speedmaster landed in 1957. It got its moniker from an image on its caseback—an observatory beneath eight stars. The stars symbolized two chronometer records and six first-place precision awards that Omega earned between 1933 and 1952, the year the Constellation launched. But Omega's new Constellation Observatory collection has a completely new procedure for measuring accuracy, one that gets around the thorny issue of these pieces having no seconds hand. Why should a seconds hand matter? Watches are tested for accuracy with photographic tracking of the seconds hand over a period of time. Having no seconds hand makes this impossible. The Constellation Observatory pieces, however, grant Omega some watchmaking history as they are the first two-hand watches to achieve Master Chronometer certification without a seconds hand.…