Offered in this auction by Second Vintage
An exceptional example of early 1960s Japanese horology, this Seiko Seikomatic reference 15017DE embodies the clean and sophisticated design language of the era. Known for its streamlined profile achieved by the recessed crown at the 4 o'clock position, this model was designed to emphasize its automatic winding capabilities—a watch you simply set and wear. The silver sunburst dial, adorned with the iconic "spinning top" logo, is remarkably preserved, offering a timeless elegance that rivals Swiss contemporaries of the period. This piece represents a significant chapter in Seiko's history, showcasing the high-quality manufacturing of the Suwa Seikosha factory.
Brand: Seiko
Model: Seikomatic
Reference Number: 15017DE
Serial Number: 2014937
Movement: Automatic Caliber 603
Dial: Silver sunburst with applied indices
Case Size: 36 mm (excluding the crown)
Case Material: Stainless Steel
Production Year: 1962
Condition: Excellent vintage condition
Dial and Hands
The silver dial is in stunning condition, featuring a subtle sunburst finish that catches the light beautifully. It is furnished with polished, faceted applied hour markers that add depth and sophistication. The sharp dauphine hands are crisp and free of corrosion, complementing the overall minimalist aesthetic. The applied Seikomatic "spinning top" logo and the script branding remain sharp and distinct. The text "Diashock 20 Jewels" and the Seikosha star logo at 6 o'clock are clearly legible, completing the balanced layout.
Case and Crystal
The stainless steel case measures 36mm and features the distinctive recessed crown at the 4 o'clock position, a design choice intended to streamline the case profile and enhance comfort. The lugs are elegantly shaped with defined chamfers. The case shows light surface scratches consistent with careful usage over the decades but retains its original geometry and finish. The caseback engravings, including the reference and serial numbers as well as the Seiko logo, are deep and clearly visible. The crystal is clear and free from distracting marks.
Movement
Powering this timepiece is the Seikosha automatic Caliber 603, a robust 20-jewel movement. The rotor is signed "Seikomatic 20 Jewels Seikosha," a charming detail for collectors indicating early production. The movement is clean and presents well visually, offering reliable vintage performance and running within vintage tolerances.
Strap
The watch is fitted with a vibrant red leather strap featuring contrast stitching. The strap is in excellent condition and adds a bold, stylish character to the watch, contrasting warmly against the cool tones of the stainless steel case and silver dial.
Condition
This timepiece is in excellent vintage condition. The dial is exceptionally well-preserved with no significant spotting or patina, which is rare for a watch of this age. The case retains strong lines and factory definition with only minor signs of wear. The movement is clean and functional.
Dimensions
The case measures 36mm in diameter, excluding the recessed crown. The lug-to-lug length ensures a comfortable fit on a variety of wrist sizes, while the slim profile allows it to slide easily under a shirt cuff.
Remarks
This Seikomatic is a collector-grade example of Seiko's rise to dominance in the automatic watch market during the early 1960s. The combination of the hidden crown case, the "Seikosha" signed movement, and the pristine dial condition makes it a desirable piece for enthusiasts of vintage Japanese watches. It captures the essence of the "Grammar of Design" era before it was formally defined.
History
Introduced in the early 1960s, the Seikomatic line was Seiko's upper-tier automatic offering, positioned just below Grand Seiko. Produced by the Suwa Seikosha factory, these watches were marketed as the definitive automatic watch for the modern businessman. The "spinning top" logo on the dial symbolizes the gyro effect of the automatic winding rotor. The reference 15017 is an early iteration that helped establish Seiko's reputation for accuracy and reliability in self-winding movements, paving the way for the legendary 62-series movements that followed.
/ Second Vintage
SKU: SEI-SMJ-0006


























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Seiko Seikomatic 貴影 – Kiei – Noble 15017DE (1962)
Seiko • 1962
Verkocht voor
€ 135
≈ US$ 151
Verkocht op 8 feb 2026
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