The Seiko Presage Style 60s Open Heart SSA425J1 is a masterclass in vintage-inspired Japanese watchmaking, capturing the pioneering design spirit of Seiko’s legendary 1964 Crown Chronograph. Developed as part of the celebrated Style 60s series, this timepiece channels the raw mid-century aesthetics of retro automotive culture, classic tailoring, and historic mechanical precision. Engineered specifically for discerning gentlemen and horology enthusiasts seeking a men black open heart automatic watch with beige lumibrite, the SSA425J1 combines iconic vintage styling with contemporary Japanese mechanical craftsmanship, making it an exceptional wrist companion for business attire, casual weekends, and evening dinners.

Vintage 1964 Aesthetic with Open-Heart and 24-Hour Subdial

The standout feature of the SSA425J1 is its matte black dial, accentuated by a prominent open-heart aperture at 9 o’clock that reveals the rhythmic, pulsating escapement of the mechanical movement. Directly adjacent at 10:30 sits an integrated 24-hour subdial with a white indicator hand, providing clear day/night distinction at a glance. Evoking genuine mid-century patina, the faceted hour indices and sharpened dauphine hands are coated with vintage beige LumiBrite, offering a warm aged-tritium look by day and vibrant green luminescence in low-light environments. A slender central seconds hand sweeps cleanly around the outer rail track, creating an engaging visual balance between classic utility and open-work mechanics.

Ergonomic 40.8mm Stainless Steel Case and Box-Shaped Hardlex

Crafted from surgical-grade stainless steel with alternating brushed and mirror-polished facets, the case measures a versatile 40.8mm in diameter, 12.8mm in thickness, and 47.0mm lug-to-lug. It features slender, tapered lugs that hug the wrist naturally and slip comfortably beneath tailored shirts and leather jackets. Encircling the dial is a fixed black bezel with a retro 60-minute track that pays homage to 1960s racing chronographs. Shielding the dial is a vintage-profile box-shaped Hardlex crystal, providing soft edge distortion and authentic retro warmth.

In-House Mechanical Sophistication: Seiko Calibre 4R39

Beating inside is the dedicated in-house Seiko Calibre 4R39 automatic movement, purpose-engineered for open-heart and 24-hour subdial configurations. Operating at 21,600 vibrations per hour across 24 jewels, this self-winding caliber provides an approximate 41-hour power reserve. It features manual hand-winding capability and a hacking stop-seconds function for precise time synchronization. Through the exhibition screw-down case back, owners can admire the intricate balance wheel, train wheels, and oscillating rotor at work.

Solid Multi-Link Stainless Steel Bracelet

The SSA425J1 comes equipped with an integrated stainless steel three-link bracelet featuring satin-brushed surfaces and polished sides. It secures comfortably via a three-fold clasp with push-button release, ensuring all-day security and comfort. Built for daily wear, the watch features 5 bar (50 meters) water resistance and 4,800 A/m magnetic resistance.

An Enduring Japanese Horological Masterpiece

Backed by Seiko’s official international manufacturer warranty, the Seiko Presage SSA425J1 Style 60s watch stands as a proud bridge between mid-century heritage and modern reliability. It remains an essential centerpiece ready to elevate any curated mechanical collection.