Now available at auction from Second Vintage This distinctively configured Seikomatic is a sought-after reference among vintage Seiko collectors, defined by its unusual dial layout featuring the day window at six o'clock and the date at three. Complete with the classic Seiko dolphin motif engraved on the well-preserved caseback and a streamlined profile achieved by the recessed crown at four o'clock, this 1966 example offers immense character and excellent mechanical performance. Brand: Seiko Model: Seikomatic Reference Number: 6206-8040 Serial Number: 6109084 Movement: Automatic caliber 6206B, 26 jewels Dial: Silver sunburst with day at 6 o'clock and date at 3 o'clock Case Size: 36mm (excluding the crown) Case Material: Stainless steel Production Year: 1966 Condition: Excellent vintage condition. Timegrapher: -10-15s/day, performing remarkably well. Dial and Hands The dial presents a well-preserved silver sunburst finish that provides a beautiful backdrop for the clean applied indices and Seiko logo. Its most striking feature is the unique calendar layout, positioning the day display at six o'clock and the date at three. The dauphine-style hands show age-appropriate oxidation and spotting, particularly near the center pinion. A close inspection reveals minor debris or light spotting on the extreme outer edge of the dial near the twelve o'clock position, maintaining an honest vintage character. Case and Crystal The stainless steel case retains its classic geometry, featuring a smooth integrated bezel and a recessed crown positioned at four o'clock for a streamlined profile. The surfaces exhibit light scratches and handling marks consistent with careful wear over the decades. Turning the watch over reveals a clearly legible and well-preserved dolphin motif engraved on the caseback, a detail highly appreciated by collectors. A clear domed acrylic crystal protects the dial, showing no major scratches or cracks. Movement Inside is the Seiko automatic caliber 6206B, featuring 26 jewels and a handsome gold-tone finish. The movement appears clean, with the rotor and bridges remaining well preserved and free of heavy corrosion. It bears the correct Seiko, 26 Jewels, 6206B, and Japan engravings. The timegrapher recorded a rate of -10-15s/day. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. Strap The watch is fitted with an attractive black leather strap featuring white contrast stitching. It remains in excellent, lightly used condition and pairs nicely with the silver dial. Condition Excellent vintage condition. The stainless steel case shows honest, light surface wear while preserving the distinct dolphin caseback engraving. The dial remains attractive with a well-preserved sunburst finish, showing only minor edge spotting near twelve o'clock and visible oxidation on the hands. The movement is remarkably well preserved visually and mechanically. Supported by the recorded timegrapher result of -10-15s/day, the movement is performing very strongly. Dimensions The case measures 36mm in diameter (excluding the crown). Remarks This Seikomatic offers a fantastic opportunity to acquire a highly distinctive mid-century Seiko. The unusual six o'clock day display, combined with the beautifully preserved dolphin caseback and strong mechanical performance, make it a compelling addition to any vintage collection. History The Seikomatic line represents a highly respected era of Seiko's automatic watchmaking in the 1960s. Designed as premium, self-winding timepieces for the domestic market, these models often featured advanced calibers and refined styling. The caliber 6200 series, including the 6206, was highly regarded for its reliability and efficiency, eventually laying the groundwork for the first automatic Grand Seiko models. The distinctive calendar layout and dolphin caseback of this specific reference highlight Seiko's innovative approach to dial design and case finishing during this prolific period. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind. We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination. Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age. We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description. The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use. If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you. As with all used watches, water resistance is not guaranteed. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-MJX-0011