Master Collection Retrograde Moonphase | Ref. L2.739.4.71.6 | 2025 Full Set (Warranty to 2027)

The Story

The Longines Master Collection has served as the absolute showcase of the Saint-Imier maison’s traditional horological mastery since its global debut in 2005. While the brand is heavily celebrated for its vintage sports re-editions, the reference L2.739.4.71.6 represents a completely different caliber of high-complication watchmaking. It is widely regarded as one of the most mechanically complex timepieces Longines has ever commercialized in its modern history. Now officially discontinued, this mechanical powerhouse steps entirely away from basic time-and-date aesthetics to present an imposing instrument-style canvas tailored exclusively for the collector who demands serious micro-mechanical density and haute horlogerie layouts at an accessible threshold.

The Craft: Quadruple Retrograde Animation & The Bespoke Caliber L707

The 44mm stainless steel case delivers a commanding, theatrical presence on the wrist, beautifully polished to emphasize its classic round classical pocket-watch curves.

The silver dial is an absolute visual masterpiece, decorated with a deeply stamped barleycorn guilloché pattern that absorbs and diffuses light beautifully. The dial hosts crisp black painted Roman numerals and a small seconds track at 6 o'clock, but its true magic lies in the four dedicated retrograde hand indicators: the day of the week at 12 o'clock, the calendar date running down the right flank, a secondary 24-hour second time zone tracking the left flank, and a sweeping small seconds hand at the bottom. When these blued steel hands reach the end of their tracks, they instantly snap back to their starting points in a fraction of a second. This mechanical symphony is balanced by a romantic moonphase aperture and a day/night disc.

Turn the watch over to admire the complex heart through the sapphire exhibition caseback: the Automatic Longines Caliber L707. Developed exclusively for Longines by the master movement architects at ETA, this highly specialized caliber utilizes advanced structural geometry to smoothly coordinate four separate retrograde spring modules alongside an annual calendar mechanism without draining energy delivery. Meticulously finished with traditional perlage and Geneva stripes across the bridges, it operates with absolute chronometric stability and provides a robust everyday power reserve.

Condition & Complete 2025 Third-Party Warranty Set

This discontinued Master Collection flagship is presented in Very Good overall condition, showing only honest, light hairline marks along its high-polished and brushed steel bracelet links, entirely consistent with proud, attentive occasional wear. The sapphire crystal is completely clean and scratch-free, the blued steel hands retain their deep factory cobalt hue, and the mechanism functions perfectly.

The timepiece arrives as a True Complete Full Set, arriving with its original Longines luxury presentation box, user manuals, official 2025 purchase documentation, and a third-party warranty card providing comprehensive coverage active through April 2027. Fully verified for amplitude stability and mechanical precision, this rare, discontinued retrograde grail represents an unmissable investment for any collector seeking a highly complicated everyday Swiss companion.