Omega French Market Chronograph 'Calibre 321'

Ask any seasoned collector to name the greatest chronograph movement ever built, and odds are they'll whisper—almost reverently—321. Designed by the gifted Albert Piguet for Lemania, the Calibre 321 was a child of the 1940s that would later become a titan of the Space Age, powering the earliest OMEGA Speedmasters worn during NASA's most daring missions. But before it became the stuff of lunar lore, this movement lived a quieter, more elegant life in refined chronographs like this one: a French-market treasure that blends haute horlogerie pedigree with old-world charm.

Lemania's long partnership with OMEGA—formalized in 1932 under the SSIH banner—produced a generation of chronograph calibers that reshaped modern watchmaking. The 321, known internally as the CH27, was the crown jewel: a crisp, column-wheel masterpiece that found its way into tool watches, dress chronographs, and everything in between. And while Speedmasters get most of the glory, these earlier gold-cased, European-delivered examples reveal the movement's more refined side: thinner cases, warmer metals, and dials that dance between utility and understatement.

This particular example is a beautifully preserved study in mid-century elegance. The 18K rose gold case frames a sober, well-preserved silvered dial marked by its characteristic Fab. Suisse script and a French tachymètre scale. Triangular indexes reinforce the case's strict, architectural lines, while gold 'feuille' hands float above stepped registers with effortless grace.   

Inside beats the legendary Calibre 321—the very movement used in the early pre-moon Speedmasters and still regarded as one of the finest chronograph calibers ever produced. It's presented on a brown alligator strap with a matching pin buckle for a quietly luxurious finishing touch.

A Speedmaster may have gone to the moon—but pieces like this are what true connoisseurs hunt for on earth.

The story of Omega is one that captivates generations of horological devotees. The second-largest watchmaker in the world in terms of annual turnover, the Bienne-based firm has been continuously producing watches since 1848, which it does today under the auspices of the Swatch Group.

Founded in La-Chaux-de-Fonds, Switzerland as La Generale Watch Co, Omega was well ahead of the horological curve from the beginning, developing the first minute-repeating wristwatch in 1892 as well as the eponymous “Omega” caliber in 1894. This 19-ligne movement was revolutionary in that its parts could be replaced by any watchmaker in the world without modification, while its winding and time-setting via the crown provided an industry standard.

Omega became the timepiece supplier of choice for the British Royal Flying Corps in 1917, while the Americans followed suit in 1918, choosing their watches for the U.S. Army. Awards for precision chronometry became almost commonplace, while 1932 saw them become the first watch brand to time an entire Olympic Games. Their Marine, which debuted the same year, is regarded as the first commercially available diver’s watch.

During the Second World War, Omega supplied well over 100,000 timepieces to British forces, making it the largest watch supplier to the British and her allies. These watches, from the unique 6B/159 to the famed “Dirty Dozen” W.W.W, remain highly collectible today.

1948 saw the launch of the original Seamaster: Built upon the tool watch legacy of the brand’s timepieces from the War, it’s since become a byword for reliability and legibility, both as a dress watch and, more recently, as a serious diver’s tool. The Speedmaster, released in 1957 and originally marketed for the auto-racing market, first rocketed to space on the wrist of American astronaut Wally Schirra in 1962. However, it became a household name when, in 1969, it accompanied Buzz Aldrin on the Moon, and later helped save the space-stranded crew of Apollo 13 in 1970 by timing a critical rocket burn.

Today, Omega’s watches — all of which feature in-house movements — run the gamut from svelte dress pieces to the venerable Speedmaster in all its guises. Providing an unquestionable value proposition, Omega is a brand that deserves to be at the center of every serious watch lover’s collection.

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Since our pieces are vintage or pre-owned, please expect wear & patina from usage and age. Please read each item description and examine all product images.

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We back each Analog:Shift vintage timepiece with a two-year mechanical warranty from the date of purchase.

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All of our watches include complementary insured shipping within the 50 states.

Most of our products are on hand and will ship directly from our headquarters in New York City. In some cases, watches will be shipped directly from one of our authorized partners.

We generally ship our products via FedEx, fully insured, within 5 business days of purchase. An adult signature is required for receipt of all packages for insurance purposes. Expedited shipping is available at an additional cost. We are also happy to hand deliver your purchase in Manhattan or you may pick it up at our showroom.

Returns must be sent overnight or by priority international delivery, fully insured and paid for by the customer. A restocking fee may apply. Watches must be returned in the same condition as initially shipped.

We welcome international buyers, please contact us prior to purchase for additional details on shipping and payment options.