Mastercraft J3

The Essence of Japanese Watchmaking The Minase Mastercraft J3 marks a new chapter in Minase’s pursuit of contemporary Japanese watchmaking. Inspired by the original M3 — one of the brand’s earliest expressions of “ultimate simplicity” — the J3 refines this philosophy into a more elegant, slimmer and more versatile form. Reduced to 37mm in diameter and only 9.9mm thick, the J3 preserves the distinctive aesthetic of the M3 while offering a more compact and universally wearable profile. A Tribute to Japanese Craftsmanship Like all Minase timepieces, the J3 is handcrafted in Japan with uncompromising attention to detail. Its stainless steel case is meticulously hand-finished using the renowned Sallaz polishing technique, producing flawless mirror surfaces and razor-sharp transitions — a signature of Minase’s artisanal identity. Its cushion-shaped case frames a perfectly round dial opening, evoking the timeless elegance of 1970s design while remaining unmistakably modern. A New Movement, A New Era For the first time in the history of the J3 lineage, Minase introduces a Japanese automatic movement: the Miyota 90S5. Beating at 28,800 vibrations per hour, this proven calibre offers: 42-hour power reserve 24 jewels High reliability and precision Slim architecture for enhanced comfort Three Light Sand Dial Variations The Mastercraft J3 is available in three refined dial colors: White Sand Beige Sand Black Sand Each dial is designed to create subtle depth and shifting light reflections depending on the angle and environment. Sharp-cut hands and luminous indexes ensure clarity in every condition. Personalize Your J3 Thanks to its one-touch quick-change system, the J3 adapts effortlessly to your style. Available with: Stainless steel bracelet Embossed calf leather straps Crocodile-pattern calf leather straps Rubber straps From classic elegance to sporty versatility, the J3 evolves with you. Specifications Case Stainless steel 37mm diameter 9.9mm thickness 5 ATM water resistance Sapphire crystal Movement Miyota 90S5 Automatic 28,800 VPH (4Hz) 24 jewels Approx. 42-hour power reserve Strap Width 18mm