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The Omega Seamaster Chronograph Reference 145.029 is one of the most underappreciated chronographs in the entire Omega catalog, and to us, that’s precisely what makes it so exciting. While its stablemate, the Speedmaster Professional, has spent decades basking in the glow of lunar glory, the Seamaster Chronograph was quietly doing the same job with arguably more style, housing the very same legendary movement in a case that screamed 1970s confidence. It is a watch that bridges two eras of Omega design, carrying the technical gravitas of the 1960s into the bold, expressive aesthetic of the new decade.
The Seamaster name was introduced in 1948 to mark Omega’s centenary, originally conceived as a robust yet refined watch for the active gentleman who moved between town, sea, and country. By the late 1960s and early 1970s, Omega was pushing the Seamaster line in a decidedly sportier direction, experimenting with daring case shapes, vivid dial colors, and new complications. The Reference 145.029 embodies this adventurous spirit perfectly. Its distinctive tonneau-shaped case broke from the round norm, giving the watch a muscular, architectural presence on the wrist that felt utterly modern. And at its heart beats the Omega caliber 861, a manual-winding chronograph movement introduced in 1968 as the successor to the revered caliber 321. Based on Lemania 1873 architecture, the 861 powered the Speedmaster Professional through the later Apollo missions and beyond. It is, without hyperbole, one of the most important chronograph movements of the twentieth century, and finding it inside a Seamaster at a fraction of Speedmaster prices remains one of the collector market’s great open secrets.
This particular example is the gold-plated variant, and it is a stunner. The case and bezel are finished in 20 microns of gold plating over a stainless steel caseback, as confirmed by the French-language engravings inside: “Carrure-Lunette Plaqué Or G, 20 Microns, Fond Acier Inoxydable.” There is a warmth and a richness to the gold-plated 145.029 that the stainless steel versions simply cannot replicate. The champagne sunburst dial has developed a gorgeous, slightly smoky tone over the decades, giving it an almost tropical quality that shifts in different lighting conditions. The three subsidiary registers, a running seconds at 9, a 30-minute recorder at 3, and a 12-hour totalizer at 6, are executed in jet black with concentric guilloche texturing at their centers, creating a striking three-dimensional contrast against the warm dial surface. The applied gold baton indices remain crisp and well-attached, and the tachymetre scale printed along the chapter ring is fully legible. Opening the caseback reveals the cal. 861 in all its copper-bridged glory, signed “Omega” and looking every bit the serious chronograph caliber it is.
In terms of condition, this is an honest, lived-in example. The gold plating on the case retains its warm luster with surface wear consistent with regular use over several decades, particularly along the case edges and pushers where contact is inevitable. The dial shows some light spotting and moisture tracks, most visible under macro photography but far less noticeable in person, lending the piece a character that tells its story. The Seamaster seahorse medallion on the caseback remains clearly defined. What truly sets this example apart, however, is the original Omega bracelet in 1/40 10kt gold overlay with its signed folding clasp. Finding a gold-plated 145.029 on its matching original gold-tone bracelet is increasingly difficult, and the bracelet here, while showing honest patina, remains solid and functional.
This is the kind of watch that rewards the educated collector. You’re getting a genuine Omega chronograph powered by caliber 861 heritage, wrapped in a case design that captures the swagger and optimism of the early 1970s, with the warmth of gold-tone finishing that elevates the entire package. It wears with the confidence of a man who orders a Negroni without looking at the menu. For anyone who loves the Speedmaster but wants something less expected, something with a bit more personality and a lot more conversation-starting power, the gold-plated Seamaster 145.029 is, in our opinion, one of the smartest plays in vintage Omega collecting.
