The Alba AL4779X2 (also designated across international catalogs as the AL4779 or AL4779X) is a bold, high-performance Japanese automatic mechanical sports timepiece from Alba’s celebrated Active Collection, manufactured under the exacting horological standards of Seiko Watch Corporation. Engineered for active gentlemen who appreciate commanding maritime sports styling paired with the traditional charm of self-winding mechanical watchmaking, this reference has earned widespread admiration among collectors and everyday carry enthusiasts by its defining community nicknames—the "Ocean Diver", "Blue Marine", "Automatic Blue", "Active Blue Diver", "Deep Blue Mechanical", or "Mechanical Sport 43"—for its rich oceanic blue aesthetics, high-visibility rotating timing bezel, and versatile dual-strap presentation. It unites a sculpted solid stainless steel case in a commanding 43.0mm diameter with a unidirectional rotating blue sports bezel, an evocative sunray blue dial face, applied faceted luminous indices, bold sword-style hands, a dual day and date calendar aperture at 3 o'clock, an in-house Japanese automatic mechanical movement, a durable mineral crystal, certified 100-meter water resistance, and an integrated solid stainless steel construction paired with an additional interchangeable strap. Perfectly calibrated for gentlemen seeking a rugged, battery-free mechanical sports watch that transitions effortlessly from aquatic adventures and outdoor excursions to casual office environments. The defining visual centerpiece of this AL4779X2 reference is its deep, luminous ocean-blue sunray dial face. Finished with an ultra-fine radial brushing technique, the dial dynamically catches and diffuses ambient lighting, shifting across rich gradients of vibrant royal cobalt, radiant sapphire, and deep oceanic navy as the wrist moves. Framing the display is a high-contrast rotating sports timing bezel fitted with an oceanic blue insert, featuring crisp silver Arabic numerals and elapsed-time gradations for tracking dive times or everyday intervals. The dial layout is engineered for immediate, split-second readability in bright daylight and low-light environments alike: bold geometric hour markers line the perimeter, generously coated with luminous compound and bordered by an angled outer minute chapter ring. Broad sword-style hour and minute hands sweep authoritatively across the dial alongside a slender central sweep seconds hand that moves with the smooth, continuous mechanical sweep unique to automatic movements. Positioned neatly at 3 o'clock is an integrated dual day and date calendar window, providing essential daily tracking while maintaining the balanced symmetry of the dial. Beneath its race-and-dive-inspired exterior, the watch is driven by the proven in-house Calibre Y676 Japanese automatic mechanical movement, engineered and manufactured under the rigorous horological standards of Seiko Watch Corporation. Operating at a frequency of 21,600 vibrations per hour (3 Hz), this 21-jewel self-winding movement harnesses the natural kinetic energy of the wearer’s wrist to wind the mainspring, delivering approximately 41 hours of autonomous power reserve without ever requiring a battery replacement. The caliber coordinates traditional mechanical three-hand timekeeping (hours, minutes, sweep seconds) alongside an efficient, synchronized quickset day-date mechanism operated directly through the fluted 3 o'clock pull-out crown. Built upon Seiko's proven mechanical architecture, the movement provides outstanding operational shock resistance, long-term durability, and dependable day-in, day-out accuracy. The case is engineered with modern, commanding sports proportions, measuring an official 43.0mm in case diameter with a case profile thickness of 13.02mm, a standard 20mm lug spacing, and protective case shoulders framing the crown. The solid stainless steel case architecture combines vertical satin brushing across the upper lug hoods with mirror-polished side flanks and chamfered bevels. Dial protection is provided by a scratch-resistant mineral crystal engineered to withstand everyday knocks, impacts, and abrasive wear. Built for active lifestyles, the solid stainless steel case features an exhibition see-through screw-down caseback that allows the wearer to view the balance wheel and rotor in motion, while securing a certified 100-meter (10 bar / 10 ATM / 330 ft) water resistance rating, safely safeguarding the movement during swimming, snorkeling, recreational water sports, rain, and daily wear. The timepiece comes completed on an integrated solid stainless steel multi-link construction with a folding clasp and double push-button safety release, and includes an additional heavy-duty interchangeable strap for instant tactical styling and lightweight comfort.

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