H. Moser & Cie. has launched the Endeavour Perpetual Calendar Concept Tantalum, a new high-end watch limited to 50 pieces. The timepiece features a case and dial crafted from solid tantalum, emphasizing a minimalist design for its perpetual calendar complication. It carries a retail price of CHF 75,000 before taxes.
H. Moser & Cie., based in Schaffhausen, Switzerland, introduced the Endeavour Perpetual Calendar Concept Tantalum on April 28. The brand highlights its in-house HMC 800 hand-wound movement, which offers a seven-day power reserve and allows adjustment of the perpetual calendar forward or backward at any time. This approach aims to eliminate the fragility common in such complications, according to the manufacturer. The dial, machined from untreated tantalum, displays a brushed sunburst effect that shifts between charcoal gray and muted blue tones in different lights. A small central hand points to hour markers for months, alongside an instantaneously jumping date, a power reserve indicator without scale, and leaf-shaped stainless steel hour and minute hands. No logos or indexes clutter the face, preserving a clean, industrial aesthetic. The 42mm tantalum case measures 13.1mm thick, topped by a curved sapphire crystal and featuring a sapphire display back framed in stainless steel. The movement, 34mm wide and 6.3mm thick, includes 32 jewels, 294 components, beats at 18,000 vph, and has a gold escape wheel with manual finishing; a leap-year indicator appears on the movement side. It pairs with a hand-stitched gray nubuck alligator strap and steel folding clasp. Tantalum's high density, corrosion resistance, and machining challenges make it a rare choice, with the brand describing its use as unforgiving due to the metal's 3,000°C melting point. Only 50 examples will be made, positioning the watch in high-horology territory.