Longines Dress watch with Ultra-Slim Cushion Case with Original Factory Mesh Bracelet from 1970

Description

This is the Longines reference 7686, a cushion-cased dress watch from the early 1970s, when Swiss makers were moving away from the round case. The stainless steel case is brushed across the top surfaces and polished on the bevels, with a squared opening over the dial.

The silver dial carries a fine vertical brushed finish, a four-quadrant crosshair, applied faceted baton markers and matching faceted baton hands. There is no seconds hand: the Longines caliber 428 inside is a two-hand, hand-wound movement of 17 jewels, and one of the thinnest Longines ever built. The watch comes on its original Longines-signed stainless steel Milanese mesh bracelet, with the winged hourglass struck into the clasp.

Technical Details

• Brand: Longines

• Reference: 7686 8

• Year of Production: Circa 1970 / 1971

• Movement Type: Manual Winding (Hand-wound)

• Caliber: Longines Cal. 428 (17 jewels, Swiss made, hand-wound, two hands — no seconds hand)

• Serial Number: 50151575

• Case Material: Stainless Steel

• Case Style: Cushion / Square-Form

• Case Dimensions: 32mm (lug-to-lug) x 30mm (width excluding crown)

• Thickness: Ultra-slim (~6mm profile)

• Dial: Silver, vertical brushed finish, four-quadrant crosshair, applied faceted baton markers

• Bracelet: Original Longines-branded Stainless Steel Mesh / Milanese Band

• Caseback Markings: Stamped with the classic perlage finishing, “ACIER INOXYDABLE” (Stainless Steel), the winged hourglass Longines logo, and “FAB. SUISSE / Swiss MADE

This watch has recently been serviced by a professional watchmaker and keeps good time.

Why this Longines?

Three things are worth pointing out. The bracelet is the original Longines-signed mesh rather than a later replacement — the winged hourglass is struck into the clasp. The caliber 428 is Longines’ own ultra-thin movement, made in-house rather than bought in. And the case can be checked against the watch itself: the inner case back is stamped ACIER INOXYDABLE / LONGINES / FAB. SUISSE / 7686 8, matching the reference given above.

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Swiss watches

are known for their long history of precision engineering and repairable mechanical design. Switzerland became the center of watchmaking from the 16th century onward, developing a system of specialized workshops that perfected reliable movements, jewelled bearings, and accurate regulation. Over time, Swiss makers excelled at chronographs and complications, creating watches that could be serviced and kept running for decades rather than treated as disposable objects.

“Swiss Made” is a legally protected label that indicates Swiss control over the movement, assembly, and final inspection, reinforcing a reputation for consistency and quality. Importantly, Swiss watches have always existed at many levels—from affordable tool watches using robust movements like Landeron or ETA, to high horology from brands such as Patek Philippe—so the reputation is not limited to luxury alone.

The Heritage of Longines: A Legacy of Precision

Founded in 1832 by Auguste Agassiz in the Swiss town of Saint-Imier, Longines stands as one of the most significant pillars in the history of horology. With a legacy spanning nearly two centuries, the brand has navigated the evolution of timekeeping from hand-assembled pocket watches to the industrialized precision of the modern era. Their “winged hourglass” logo, registered in 1889, holds the distinction of being the oldest unchanged active trademark in the International Registry at WIPO, symbolizing a steadfast commitment to quality that has endured for generations.

The Architect of Modern Chronographs

Longines’ historical identity was forged in the pursuit of absolute technical utility. In the early 20th century, while many houses remained focused on aesthetics, Longines became the architect of modern sports and aviation timing. They developed the world’s first wrist chronograph in 1913 (Caliber 13.33Z) and later the legendary Caliber 13ZN, which from 1936 took Longines’ patented flyback into series production—a mechanical necessity for pilots who needed to reset their chronographs instantly while navigating. Longines had already run the flyback on a handful of 13.33Z movements from about 1927, several years before the patent was filed.

Pioneers of the High-Beat Era

The brand’s obsession with accuracy culminated in the 1960s with the “high-frequency” revolution. While the industry standard was a beat rate of 18,000 or 21,600 vibrations per hour (vph), Longines pushed mechanical engineering to its physical limit. In 1967, to celebrate their 100th anniversary, they released the Ultra-Chron. It was a mechanical triumph designed to rival the emerging electronic and quartz movements, guaranteeing accuracy to within one minute per month. This was achieved through the Caliber 431, a movement that oscillated at 36,000 vph, producing a seconds hand sweep so smooth it appeared virtually seamless to the naked eye.

A Legacy of Exploration

Beyond the workshop, Longines was the preferred instrument for the world’s most daring explorers. From Charles Lindbergh’s solo Atlantic crossing to Admiral Byrd’s expeditions to the South Pole, Longines provided the navigational precision required for survival in the most extreme conditions on Earth. This “Avigation” heritage remains the soul of the brand today, making a vintage Longines not just a timepiece, but a direct link to the golden age of human discovery and mechanical ingenuity.

Why Collectors Buy Vintage Longines

Collectors seek out vintage Longines because the brand offers a genuine horological pedigree and movements of real significance—like the flyback 13ZN and the 36,000 vph Ultra-Chron—at a fraction of the cost of other historic Swiss marques.