Now available at auction from Second Vintage This distinguished Seiko Seikomatic-P is a compelling example of Japanese horological innovation from the late 1960s. Representing the "Presmatic" or push-button date era, this model combines a high jewel-count automatic movement with a refined aesthetic that bridges the gap between everyday durability and dress watch elegance. The 33-jewel movement and the unique case architecture make this a desirable piece for collectors appreciating the golden era of Seiko manufacturing. Brand: Seiko Model: Seikomatic-P Reference Number: 5106-8020 Serial Number: 804336 Movement: Automatic Caliber 5106A Dial: Silver sunburst with applied gold indices Case Size: 38 mm (excluding the crown) Case Material: Gold Plated (SGP) Production Year: 1968 Condition: Good vintage condition. The watch presents honest signs of age with visible wear to the dial, gold plating and crystal. Timegrapher testing indicates a daily rate of approximately -35 to -40 seconds per day, showing that the movement is operational. Dial and Hands The silver sunburst dial is the centerpiece of this watch, offering a clean and sophisticated backdrop for the applied gold-tone indices. The markers feature black inserts that match the design of the dauphine-style hands, ensuring excellent legibility and a cohesive look. The applied "SEIKO" logo and the "Seikomatic-P 33 JEWELS" text are crisp and well-preserved. A framed day-date window is positioned at 3 o'clock, adding functional utility to the classic layout. There are minor signs of patina and small spots on the dial surface visible under close inspection, which attests to its vintage originality. Case and Crystal The 38 mm case is substantial for the era, offering a modern wrist presence. It is finished in Seiko's Gold Plating (SGP), which shows evident signs of vintage wear. There is fading and surface scratching present on the lugs and bezel, consistent with a watch that has been enjoyed over the decades. The case edges remain reasonably defined despite the surface wear. The stainless steel caseback is clearly engraved with the reference and serial numbers. The crystal exhibits visible scratches and hazing, which is typical for a timepiece of this age. Movement Powering this timepiece is the impressive Automatic Caliber 5106A. This movement is notable for its high jewel count of 33 jewels, a specification often reserved for higher-tier models during this period. The movement features the innovative push-button date quickset mechanism integrated into the hexagonal crown, a signature feature of the "P" series. Timegrapher testing indicates a daily rate of approximately -35 to -40 seconds per day, showing that the movement is running. Strap The watch is fitted with a black leather strap featuring contrasting gold-tone stitching that complements the gold-plated case perfectly. The strap is in excellent condition and is secured by a gold-tone buckle, making the watch ready to wear immediately. Condition This timepiece is in good vintage condition. It displays visible wear throughout, particularly on the gold-plated surfaces and the crystal, which contributes to its authentic vintage character. The dial remains attractive despite minor aging. The movement is functioning, with timegrapher results of -35s to -40s/day provided for full transparency regarding its current performance. Dimensions With a case diameter of 38 mm excluding the crown, this Seikomatic-P sits prominently on the wrist. The lug design and bezel proportions create a balanced profile that works well for both casual and formal occasions. Remarks The Seikomatic-P reference 5106-8020 is a significant model for Seiko enthusiasts, showcasing the brand's drive for technical refinement in the late 1960s. The combination of the complex 33-jewel movement and the distinctive hexagonal crown makes it a mechanically interesting piece. This specific example, with its honest patina and substantial case size, offers a genuine entry point into vintage Japanese collecting. History Produced in October 1968, this watch hails from the Daini Seikosha factory, as indicated by the lightning bolt logo on the dial. The Seikomatic line was the premium automatic tier for Seiko before the dominance of Grand Seiko and King Seiko fully took over the luxury segment. The 5106 caliber introduced a level of convenience and complexity that demonstrated Seiko's ability to mass-produce high-performance mechanical movements that could rival their Swiss counterparts. 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). 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. 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-SMJ-0010