Presented for auction by Second Vintage
This sought-after Seikomatic Weekdater represents a fascinating chapter in mid-century Japanese watchmaking. Driven by the highly regarded 35-jewel 6218B automatic movement, this 1965 example pairs an exceptionally clean silver sunburst dial with the classic Weekdater layout, featuring a full day display at the 3 o'clock position. The distinctive recessed crown completes a refined vintage profile that remains a genuine collector favourite.
Brand: Seiko
Model: Seikomatic Weekdater
Reference Number: 6218-8950
Serial Number: 5903534
Movement: Automatic caliber 6218B, 35 jewels
Dial: Silver sunburst with applied gold-tone indices and day/date windows
Case Size: 36 mm (excluding the crown)
Case Material: Gold Plated
Production Year: 1965
Condition: Good vintage condition. Timegrapher: -40s/d, running strong and steady.
Dial and Hands
The exceptionally clean and well-preserved silver sunburst dial is the visual highlight of this watch. The sunburst finish remains remarkably bright, complemented by applied gold-tone indices that catch the light beautifully. All printed text is crisp and fully intact, while the day and date windows are clean with clear typography. The gold-tone dauphine hands present honest wear consistent with age, showing some surface scratches and minor oxidation visible under macro inspection, though their classic shape and edges remain well-defined.
Case and Crystal
The gold-plated case is heavily worn with visible plating loss, presenting a character shaped by decades of use. There are heavy scratches and scuffs on the case flanks, alongside significant plating wear and loss particularly notable on the lugs, edges, and the integrated smooth bezel. The caseback shows typical surface wear, yet the factory engravings remain clear and legible. The recessed crown at the 4 o'clock position appears unsigned, which is typical for this model, and exhibits some plating wear. A domed acrylic crystal protects the dial, remaining clear with no major cracks or deep scratches, showing only minor surface wear typical of the material.
Movement
Inside beats the highly regarded Seiko automatic caliber 6218B, featuring 35 jewels. The movement appears generally clean, with the rotor and plates showing only minor surface marks and no heavy corrosion or visible damage. Engravings for Seiko, Japan, and the 35-jewel count are clearly present. Recording -40s/d on the timegrapher. Performing well within expected vintage tolerances; running strong and steady.
Strap
The watch is fitted with a modern black textured leather strap featuring thick orange contrast stitching. The strap appears in near-new condition with minimal wear, providing a striking visual contrast to the gold-plated case.
Condition
Good vintage condition. The dial is exceptionally preserved, remaining clean and bright with crisp printing and well-defined indices. Conversely, the gold-plated case exhibits heavy wear, with significant scratches, scuffs, and visible plating loss across the flanks, lugs, and bezel. The hands show minor oxidation under magnification, while the crystal remains clear with only light surface wear. The movement is running strong and steady, supported by the timegrapher reading of -40s/d.
Dimensions
The case measures 36 mm in diameter, excluding the crown.
Remarks
This Seikomatic Weekdater offers a compelling mix of high-grade mechanical performance and honest vintage character. The exceptional preservation of the dial paired with the highly regarded 35-jewel 6218B caliber makes it a desirable acquisition for enthusiasts of mid-century Japanese watchmaking.
History
The Seikomatic Weekdater line emerged in the mid-1960s as one of Seiko's premium automatic offerings, designed for the discerning professional. The integration of a full day display alongside the date was a highly practical innovation of the era. The caliber 6218, with its impressive 35-jewel count and refined architecture, laid the groundwork for the brand's most prestigious models, cementing Seiko's reputation for producing robust and beautifully engineered mechanical timepieces during a golden age of Japanese horology.
/ Second Vintage
SKU: SEI-WJX-0001














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Seiko - Seikomatic Weekdater - No reserve price - 6218-8950 - Men - 1965
Seiko • 1965
Auction Ended
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