Baume & Mercier Riviera Grey, Sans Dial 42mm Men M0A10702

Fusing the iconic 1973 dodecagonal luxury sports silhouette with horological transparency, in-house manufacture mechanics, and an all-steel integrated bracelet architecture, the Baume & Mercier Riviera Baumatic 42mm M0A10702 represents the quintessential all-road Swiss sports-chic timepiece. Sculpted in a 42.00 mm surgical-grade 316L stainless steel case measuring a slender 10.66 mm in profile with an integrated lug geometry, this flagship timepiece showcases the Riviera collection's signature 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 grey sapphire crystal face (verre saphir fumé gris) decorated with transparent wave transfer motifs that evoke ocean swells while revealing the underlying gear trains, jewel bearings, and rotating date mechanism. Accented by rhodium-plated riveted Roman numerals at 12 and 6 o'clock, faceted trapezoid hour indices, matching openworked dauphine hands coated with white Super-LumiNova (blue nocturnal emission), and an integrated date aperture at 3 o'clock beneath a scratch-resistant anti-reflective sapphire crystal, the display combines mechanical depth with low-light legibility. Through the exhibition sapphire crystal case back, the in-house Manufacture Baumatic Calibre BM13-1975A is on full display. Engineered with a silicon hairspring and Powerscape escapement, it delivers magnetic resistance up to 1,500 Gauss and a class-leading 120-hour (5-day) power reserve. Mounted on an integrated 3-row solid stainless steel bracelet featuring tool-free "Fast Strap" quick-release interchangeability and a triple-folding clasp with security pushers, 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 maintenance intervals.

• Class-Leading 120-Hour (5-Day) Power Reserve: Twin-barrel mechanical architecture delivering 5 full days of autonomous energy reserve, keeping accurate time across an entire weekend off the wrist.

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

• Translucent Smokey Grey Sapphire Dial: Smoked sapphire crystal face revealing the moving gear trains and skeletonized date wheel beneath transparent nautical wave motifs.

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

• Rhodium-Plated Dauphine Hands & Markers: Riveted Roman numerals at 12 and 6 o'clock and faceted trapezoidal markers delivering crisp reflections against the dark smoked 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.

• Assertive 42.00mm Case Proportions: Confident 42 mm diameter and slender 10.66 mm profile offering sports-luxury wrist presence without excess bulk.

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

• Integrated 3-Row Solid Steel Bracelet: Articulated metal bracelet featuring satin-brushed outer links and mirror-polished center accents.

• 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 active water 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 42mm All-Steel Dodecagonal 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 M0A10702, Baume & Mercier equips this 42.00 mm diameter chassis with an all-steel architecture. Forged from surgical-grade 316L stainless steel, the case combines satin-brushed case flanks with mirror-polished beveled chamfers and a circular satin-finished 12-sided bezel. Four functional polished steel screws anchor the bezel, emphasizing its architectural character. The screw-down octagonal 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 manufacture movement.