Offered in this auction by Second Vintage This is a truly exceptional example of the Seiko Seikomatic Weekdater, a flagship model from the early 1960s that set the standard for Japanese automatic watches. With its high-jewel count movement, "Day-at-6" layout, and impressive 37mm case size, this J13080 reference represents the golden era of Seiko design. This specific piece features a fascinating commemorative Kanji engraving on the caseback, adding unique historical provenance and character to an already stunning collector's piece. Brand: Seiko Model: Seikomatic Weekdater Reference Number: J13080 Serial Number: 3018339 Movement: Automatic Seikosha 33 Jewels Dial: Silver Sunburst Case Size: 37 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1963 Condition: Stunning vintage condition. The watch presents beautifully with a remarkably clean dial and sharp case lines, running exceptionally well with timegrapher results showing +5 to +8 seconds per day. Dial and Hands The silver sunburst dial is in remarkable condition, free from significant aging or blemishes, which is rare for a watch of this vintage. It features substantial, multi-faceted applied silver hour markers that catch the light beautifully. The signature "Day-at-6" window displays the full day of the week in English, while the date is positioned at 3 o'clock. The text "Water 30 Proof" and "Diashock 33 Jewels" is crisp and intact. The sharp dauphine hands are polished and corrosion-free, completing the sophisticated mid-century aesthetic. Case and Crystal The stainless steel case measures a generous 37mm, offering a modern presence on the wrist. The signature recessed "hidden" crown at 4 o'clock is a hallmark of the Seikomatic line, designed to emphasize the automatic nature of the watch (implying no need for daily winding). The case retains strong definition on the lugs and bezel. The screw-down caseback features a special Kanji inscription, translating to a "10-Year Continuous Service Award," a traditional corporate gift in Japan that adds a layer of history to the piece. The acrylic crystal is clear and free of distracting marks. Movement Powering the watch is the high-grade Seikosha 33-jewel automatic movement, a predecessor to the famous 62 series movements used in early Grand Seikos. The movement features a gold-toned rotor and is immaculately clean. It is offering reliable vintage performance, with timegrapher testing showing a very healthy rate of +5 to +8 seconds per day and strong amplitude, indicating a healthy movement. Strap The watch is fitted with a high-quality black leather strap featuring white accent stitching near the lugs. The strap is supple and complements the monochromatic elegance of the silver dial and steel case perfectly, securing with a steel pin buckle. Condition This timepiece is in stunning vintage condition. The dial preservation is near-perfect, the case shows only minor surface handling marks consistent with careful use, and the movement is mechanically sound. It is a collector-grade example that is ready to be worn and enjoyed immediately. Dimensions Case diameter: 37 mm Lug width: 19 mm Remarks The Seikomatic Weekdater J13080 is a significant reference in Seiko's history, bridging the gap between standard automatics and the introduction of the Grand Seiko automatic line. The 33-jewel count was a statement of luxury and precision in 1963. The presence of the "Water 30 Proof" text dates this strictly to the early 60s before the switch to "Water Resistant" nomenclature. The commemorative inscription on the back makes this not just a watch, but a piece of Japanese corporate history. History Launched in the early 1960s, the Seikomatic line was Seiko's first serious push into high-end automatic watches for the domestic and international market. The Weekdater series was designed for the rising business class, offering practical calendar functions in a robust and elegant package. These watches laid the technical and design groundwork for the 62GS, the first automatic Grand Seiko, making them historically essential for any serious Seiko collector. Payment and Shipping Payment must be completed within 1-3 days after purchase. The watch will be securely packaged and shipped with tracking and insurance for your peace of mind. Please review the pictures carefully before bidding. We strive to showcase the watch from multiple angles for an accurate representation. As with all vintage watches, water resistance is not guaranteed. The watch will be delivered in fully functional working condition. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-SMW-0011