Longines selected a sportier (however extra compact) case profile for the Flagship Heritage in comparison with earlier moonphases like the Master Collection. The Flagship Heritage measures 47mm lug-to-lug, with the lugs having polished aspects that give option to a brushed midcase. The screw-down caseback has Longines’ flagship gold-and-blue-enamel emblem and supplies the Flagship Heritage 30 meters of water resistance, anticipated for a watch like this.
The crown sits comparatively low into the midcase due to the moonphase module that is added onto the bottom caliber. Inside ticks the Longines caliber L899.5, primarily based on an ETA caliber from dad or mum Swatch Group. It makes use of a easy moonphase complication pushed by a disk with 59 tooth and two moon disks printed on it, advancing one tooth per day. A lunar month is about 29.5 days (29 days, 12 hours, 44 minutes, and a couple of seconds to get particular about it), so this implementation is what you’d count on for a moonphase that is available in at three grand.