Seiko - Seikomatic-P 光糸 (Kōshi) – Threads of Light - No reserve price - 5106-8020 - Men - 1967

Offered in this auction by Second Vintage This Seiko Seikomatic-P is a distinctive example of late 1960s Japanese horology, featuring the highly regarding 33-jewel automatic movement. Originally positioned as a high-end executive timepiece, the Seikomatic-P (often associated with the "Presmatic" line) introduced advanced features such as the hexagonal button within the crown for date quick-setting. With its substantial 39mm case size, which was considered "jumbo" for its era, and a stunning sunburst dial, this piece offers a significant presence on the wrist and represents a golden era of Seiko innovation. Brand: Seiko Model: Seikomatic-P Reference Number: 5106-8020 Serial Number: 7967872 Movement: Automatic Caliber 5106A Dial: Silver Sunburst Case Size: 39 mm Case Material: Gold Plated Production Year: 1967 Condition: Fair vintage condition, largely due to cosmetic wear on the case plating, though the dial remains exceptional. Timegrapher readings monitoring at -38s-49s/day indicating healthy movement. Dial and Hands The silver sunburst dial is the highlight of this timepiece, presenting in excellent condition with a clean, radiant finish. It features substantial applied gold-tone indices and crisp black text, including the "33 Jewels" count and the Daini factory lightning bolt logo. The gold-tone dauphine hands are sharp and sporty, complementing the framed day-date window at 3 o'clock. The lume plots show natural aging consistent with the watch's vintage nature. Case and Crystal The oversized 39mm case is gold-plated (SGP) and exhibits clear signs of its journey through time, with noticeable plating wear on the lugs, bezel edges, and sides where the base metal is visible. This honest patina gives the watch a true vintage character. The unique hexagonal crown, designed for the specific quick-set function of the 5106 movement, is present. The caseback is stainless steel, clearly engraved with the reference and serial numbers. The crystal is clear, allowing an unobstructed view of the pristine dial. Movement Powering the watch is the impressive Seiko Caliber 5106A, a 33-jewel automatic movement known for its durability and complexity. This high-jewel count was a hallmark of Seiko's upper-tier watches in the 1960s. The movement is clean and visually appealing. Timegrapher results show a rate of -38s-49s/day, indicating a movement that is healthy. Strap The watch is fitted with a vintage gold-tone link bracelet that matches the aesthetic of the case. The bracelet features a signed Seiko clasp. Similar to the case, the bracelet shows signs of fading and plating wear between the links and on the surface, consistent with the overall vintage condition. It is adjusted to fit a wrist size of approximately 18cm. Condition This timepiece runs and functions, categorized in fair vintage condition primarily due to the aesthetic wear on the gold plating of the case and bracelet. However, the dial remains in beautiful preservation, making this a watch that looks exceptional on the wrist despite the cosmetic wear to the housing. Dimensions The case measures an impressive 39 mm in diameter excluding the crown, offering a modern wearing experience. The lug-to-lug distance ensures a comfortable fit, while the bracelet accommodates a wrist circumference of roughly 18cm. Remarks The Seikomatic-P is a collector's favorite due to its innovative "push-button" date mechanism and high-jewel movement. The 5106 caliber allows for an instant date change, a significant technological feat for 1967. Finding one with such a clean dial is increasingly difficult. History Produced in September 1967, this watch hails from the Daini Seikosha factory. The Seikomatic line was the testing ground for many technologies that would eventually find their way into Grand Seiko models. The "P" in the model name is widely believed to reference the "Presmatic" mechanism, showcasing Seiko's dedication to user-friendly complications during the fiercely competitive mechanical watch market of the 1960s. /Second Vintage SKU: SEI-SMJ-0004