Baume & Mercier Riviera Blue, Sans Dial 39mm Men M0A10714

Uniting the iconic 1973 luxury sports silhouette with horological transparency, maritime azure depth, and in-house manufacture mechanics, the Baume & Mercier Riviera Baumatic 39mm M0A10714 represents an all-road Swiss luxury sports timepiece. Sculpted in a 39.00 mm surgical-grade 316L stainless steel case measuring 10.21 mm in profile with an integrated lug architecture, this timepiece showcases the Riviera collection's signature dodecagonal (12-sided) bezel secured by four functional polished steel screws, alternating between circular satin-brushed surfaces and mirror-polished chamfered bevels. The dial features a translucent smokey blue sapphire crystal face (verre saphir fumé bleu) decorated with transparent transfer waves, offering an openworked view into the underlying gear train, jewel bearings, and revolving date wheel. Accented by rhodium-plated riveted Roman numerals at 12 and 6 o'clock, faceted trapezoid hour indices, matching faceted dauphine hands filled with white Super-LumiNova (blue nocturnal emission), and an integrated date aperture at 3 o'clock beneath a double anti-reflective scratch-resistant sapphire crystal, the watch is powered by the in-house Manufacture Baumatic Calibre BM13-1975A. Engineered with silicon balance spring technology, it delivers 1,500 Gauss magnetic resistance and a 120-hour (5-day) power reserve. Mounted on an interchangeable blue hybrid rubber-alligator strap with tool-free "Fast Strap" quick-release spring bars and a stainless steel triple-folding deployant clasp, it is pressure-tested for 100 metres (10 bar / 10 ATM) of aquatic water resistance and backed by Baume & Mercier’s official 2-year international warranty (extendable to 8 years upon registration).

Key Highlights

• In-House Manufacture Baumatic Calibre BM13-1975A: High-performance Swiss automatic movement operating at 28,800 vph (4 Hz) across 21 jewels with extended service intervals.

• Class-Leading 120-Hour (5-Day) Power Reserve: Twin-barrel mechanical architecture delivering 5 full days of autonomous energy reserve, running continuously across an entire weekend without winding.

• High Magnetic Field Resistance (1,500 Gauss): Advanced silicon hairspring and Powerscape escapement protecting chronometric rate against everyday digital and electronic magnetic fields.

• Smokey Blue Translucent Sapphire Dial: High-tech smoked blue sapphire crystal dial face revealing the mechanical movement's gear train and skeletonized date disc beneath transparent ocean waves.

• Iconic Dodecagonal (12-Sided) Screwed Bezel: Signature Riviera 12-sided steel bezel anchored by four functional polished steel screws, combining circular satin-brushed and polished bevels.

• Rhodium-Plated Dauphine Hands & Indices: Riveted Roman numerals at 12 and 6 o'clock and faceted trapezoidal markers delivering crisp reflections against the blue sapphire background.

• Super-LumiNova Blue Nocturnal Emission: Hands and hour markers treated with Swiss Super-LumiNova (Phos BL485nm Grade X1) emitting a vivid blue glow in low light.

• Tailored 39.00mm Case Architecture: Balanced mid-size diameter with a 10.21 mm thickness engineered for versatile wrist ergonomics.

• Exhibition Sapphire Crystal Case Back: Transparent screwed case back revealing circular graining, Côtes de Genève striping, and an openworked rotor.

• Interchangeable Blue Rubber-Alligator Strap: Hybrid blue strap combining the elegance of alligator grain with the water resistance and comfort of vulcanized rubber.

• Integrated Tool-Free Strap Interchangeability: "Fast Strap" quick-release system allowing effortless strap changes in seconds without tools.

• 100-Metre (10 ATM) Aquatic Water Resistance: Pressure-tested to 10 bar (100 m / 330 ft) with a screw-down crown for swimming and marine sports.

• Official International Warranty (Extendable to 8 Years): Backed worldwide through the Richemont global service network with an additional 6-year warranty extension upon registering the Baumatic movement.

Design & Craftsmanship

1973 Riviera Heritage & The 39mm Dodecagonal Steel Chassis

First unveiled in 1973, the Riviera broke traditional design conventions by introducing a dodecagonal (12-sided) bezel paired with an integrated silhouette, establishing itself as one of the original Swiss luxury sports watches. In reference M0A10714, Baume & Mercier celebrates this legacy with a tailored 39.00 mm diameter and a slender 10.21 mm profile. Forged from surgical-grade 316L stainless steel, the case combines satin-brushed flanks with mirror-polished beveled edges. The 12-sided bezel features circular satin brushing anchored by four functional polished steel screws. The screw-down fluted winding crown is embossed with the Greek letter Phi (Φ)—the symbol of the Golden Ratio and divine harmony. On the reverse side, an exhibition sapphire crystal case back secured by four screws provides an unhindered view of the in-house manufacture calibre.