Offered in this auction by Second Vintage The 1970s represented a golden era of daring and expressive watchmaking for Seiko, and the Japanese Domestic Market exclusive 5 Actus line stands as a brilliant testament to that unbridled creativity. Designed to capture the attention of a young, style-conscious demographic, these timepieces merged robust mechanical reliability with striking, avant-garde aesthetics. This particular example is a visual triumph, characterized by its mesmerizing vibrant blue dial and an intricate faceted crystal that catches the light from every angle. It is a captivating piece of Seiko’s history that offers an unmistakable vintage presence on the wrist. Brand: Seiko Model: 5 Actus SS Movement: Automatic, Caliber 6106, 23 Jewels Dial: Vibrant blue sunburst gradient, applied faceted indices, exceptionally clean condition with no visible spotting or damage Case Size: 38 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1970s Condition: Excellent vintage condition, showcasing a pristine dial and honest, attractive case wear Dial and Hands The dial of this timepiece is a spectacular showcase of Seiko's mastery over color and texture, featuring a brilliant blue sunburst gradient that deepens toward the outer edges. The dial is in outstanding, clean condition, completely free of visible moisture marks, spotting, or surface degradation, maintaining its factory-fresh vibrancy. It is adorned with highly polished, applied faceted baton indices that perfectly complement the geometry of the crystal above. The applied "SEIKO" and "5 ACTUS" logos sit proudly at the upper half, while the crisp "SS 23 JEWELS" text is printed below. A framed day-date aperture at the three o'clock position displays the day in both English and traditional Kanji, adding a highly desirable Japanese Domestic Market touch. The polished baton hands remain sharp and clean, sweeping elegantly across the beautifully preserved dial. Case and Crystal The stainless steel cushion case exemplifies the robust and futuristic design language of the era. It features a beautifully brushed upper surface that transitions into highly polished, sweeping flanks. The lug profile remains sharp and well-defined, showing only honest, age-consistent light scratches and handling marks typical of a lovingly worn vintage piece. The crown is seamlessly recessed into the case at the four o'clock position, preserving the watch's sleek, uninterrupted silhouette. Above the dial sits a striking, period-correct faceted crystal. The geometric cuts in the crystal are sharp and distinct, creating a dynamic interplay of light and reflection that brings the blue dial to life while remaining free of any visually distracting heavy scratches. Movement Powering this timepiece is the esteemed Seiko Caliber 6106 automatic movement, a 23-jewel workhorse known for its durability and efficient winding capabilities. This movement features a quickset mechanism for the day and date functions, operated by pushing the crown inward. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. The timegrapher results reflect an impressive +15 to +18 seconds per day. Strap The watch is presented on a handsome blue textured leather strap with matching blue stitching. This pairing perfectly complements the vibrant tones of the dial, providing a cohesive and stylish aesthetic while ensuring comfortable daily wear. Condition This watch is in excellent vintage condition. The case retains its factory brushing and sharp transitions, with only minor, superficial scuffs on the polished surfaces that are entirely consistent with normal, careful use over the decades. The true highlight is the dial, which has been exceptionally well-preserved and shows no signs of age-related degradation, staining, or print loss. The faceted crystal is clear and its geometric edges remain crisp. Dimensions The stainless steel case measures a substantial and modern-wearing 38 mm in diameter, excluding the recessed crown. The cushion shape and integrated lug design provide a broad, commanding presence on the wrist while maintaining a comfortable and balanced profile. Remarks Finding a Seiko 5 Actus with such a pristine, vibrantly colored dial and an intact faceted crystal is becoming increasingly difficult for collectors. This piece perfectly captures the funky, optimistic spirit of 1970s Japanese design. It is a highly wearable conversation piece that offers both mechanical intrigue and undeniable visual flair. History Introduced in the late 1960s and flourishing throughout the 1970s, the Seiko 5 Actus line was created specifically for the Japanese Domestic Market. Positioned to appeal to young professionals and students, the Actus range pushed the boundaries of traditional watch design by incorporating bold dial colors, asymmetrical case shapes, and heavily faceted crystals. The "SS" designation on the dial stands for "Second Setting," indicating the hacking feature of the upgraded 6106 movement, which allowed for precise time synchronization. Today, these models are highly sought after by vintage enthusiasts who appreciate Seiko's fearless design era. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and very securely packaged, and shipped with tracking and insurance for your peace of mind. We ship via fast express service, with typical delivery in 1–4 business days (destination dependent). Note that with vintage watches, minor signs of wear, aging, or imperfections may be present and are considered normal for watches of this age. Please review all photos carefully before bidding. We strive to photograph each watch from multiple angles for the most accurate representation. The photos form an important part of the description. If there are any concerns of functionality or defects after delivery, make sure to contact us within 3 days of receiving the watch so we can assist you. As with all vintage watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI1SK5TT3000