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Erwin Dekker

A beautiful example of early Seiko automatic ingenuity, this Seikomatic 6206-8100 stands out with its crisp silver dial, reliable 26-jewel movement, and classic mid-century styling. The watch displays a clean aesthetic with brushed silver sunburst finish, robust case lines, and a rare full-English blue “SATURDAY” day wheel. A stunning addition for Seiko collectors, this piece offers both vintage charm and strong mechanical performance.

Brand: Seiko
Model: Seikomatic
Reference Number: 6206-8100
Serial Number: 6646944
Movement: Seiko 6206A, automatic, 26 jewels
Dial: Silver sunburst with applied indices, framed day-date windows, blued “SATURDAY” day disk, original baton hands and seconds hand
Case Size: 36mm (excluding the crown)
Case Material: Stainless steel
Production Year: 1966
Condition: Excellent vintage condition; performing at approximately +30 to +36 seconds per day on a timegrapher, indicating a healthy movement

Dial and Hands
The original silver sunburst dial is in superb condition, free from notable blemishes or discoloration. Applied steel indices and Seiko logo retain their original shine. All hands are original, with beautifully faceted edges and minimal aging. The framed day-date windows add functional elegance, and the blue “SATURDAY” display is a charming detail sought-after among collectors.

Case and Crystal
The bold, sculpted stainless steel case remains unpolished with sharp edges and strong brushing. The factory-engraved caseback medallion is crisp and clear, showing the classic dolphin motif and all reference engravings. The acrylic crystal is clear with only minor hairlines, preserving excellent readability.

Movement
Powered by the Seiko 6206A automatic movement, this piece delivers robust reliability. The movement shows clean bridges and bright gold-toned components. Timekeeping performance is measured at approximately +30 to +36 seconds per day, well within vintage tolerances and indicating a healthy caliber.

Strap
Fitted with a new black textured leather strap (aftermarket), complementing the watch’s classic lines and ready for immediate enjoyment.

Condition
Overall, the watch presents in beautiful condition with minimal signs of wear. The case retains strong definition; dial, hands, and crystal are in excellent shape. The movement is running and performing at +30 to +36 seconds per day.

Dimensions
Case: 36mm diameter (excluding crown)
Lug-to-lug: Approx. 43mm
Thickness: Approx. 12mm
Lug width: 19mm

Remarks
An excellent example of the desirable Seiko Seikomatic 6206-8100. Its original dial, attractive case form, and robust movement make it a quintessential piece for both new and seasoned collectors. The watch is ready to wear, display, or add to any serious Seiko collection.

History
Introduced in the 1960s, Seiko’s Seikomatic line was at the forefront of Japan’s watchmaking innovation, offering automatic winding, superior water resistance, and functional day-date complications. Reference 6206-8100 is celebrated for its minimalistic design, reliability, and the distinctive colored day wheels—it remains a symbolic representation of Seiko’s commitment to affordable luxury and engineering excellence.

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. I 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 me after the auction ends.

/ Vintage Watches DK

Automatic - Stainless steel

Seiko - Seikomatic "Silver Sunburst" - Ingen mindstepris - 6206-8100 - Men - 1966

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Seiko - Seikomatic "Silver Sunburst" - Ingen mindstepris - 6206-8100 - Men - 1966

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