Seiko - Speed-Timer Chronograph - No reserve price - 6139-7012 - Men - 1972

Now available at auction from Second Vintage

This 1972 Seiko Speed-Timer pairs a sought-after Japanese Domestic Market configuration with striking visual contrast. Characterized by its original helmet-style geometry, the reference 6139-7012 was notably issued to Japanese Air Self-Defense Force jet fighter pilots during the 1970s. The vibrant yellow chronograph hands against the deep matte black dial create an exceptionally clean and vibrant aesthetic, supported beautifully by its original signed bracelet.

Brand: Seiko
Model: Speed-Timer
Reference Number: 6139-7012
Serial Number: 290600
Movement: Automatic, Caliber 6139B, 21 Jewels
Dial: Matte black with orange text and Kanji day wheel
Case Size: 41 mm (excluding the crown)
Case Material: Stainless steel
Production Year: 1972
Condition: Excellent vintage condition. Timegrapher: -20-25s/day, running strong and steady.

Dial and Hands
The matte black dial finish is in excellent condition, offering an exceptionally clean and vibrant backdrop for the crisp orange Speed-Timer text and the clean white and orange minute track. The lume plots remain intact and clean. A Kanji day wheel provides a distinct Japanese Domestic Market detail. The white baton hour and minute hands feature clean lume, while the vibrant yellow central chronograph and subdial hands show no significant oxidation or paint loss.

Case and Crystal
The 41 mm stainless steel case displays its original helmet-style geometry, which remains well preserved. The top surface is brushed, transitioning to polished flanks. The case exhibits honest vintage wear, with light scratches and minor dings consistent with age. A recessed crown sits at the 3 o'clock position, flanked by chronograph pushers at 2 and 4 o'clock. The internal tachymeter ring is clean and legible, with no external rotating bezel present on this model. The flat mineral crystal is clean, showing no major scratches or chips visible.

Movement
Powering the watch is the automatic Caliber 6139B, marked with Seiko, Japan, and 21 Jewels. The movement features a vertical clutch and column wheel, alongside a mechanism to switch the date, day, and language by pushing the crown. The caliber presents a clean overall appearance with no obvious corrosion or damage, while the visible rotor shows light surface marks. The timegrapher records -20-25s/day. Performing well within expected vintage tolerances; running strong and steady.

Strap
The watch is fitted with its original signed bracelet featuring a distinctive link design and a signed Seiko 5 Sports clasp. The stainless steel bracelet shows moderate wear and light scratches, retaining a strong original and period-correct character. It accommodates a maximum wrist size of 18 cm.

Condition
Excellent vintage condition. The dial and hands are exceptionally clean and vibrant, standing out beautifully against the honest vintage wear of the case, which shows light scratches and minor dings consistent with age. The flat mineral crystal is well preserved, and the original signed bracelet displays moderate wear. Supported by the timegrapher reading of -20-25s/day, the movement is running strong and steady.

Dimensions
Case Size: 41 mm (excluding the crown)

Remarks
This Speed-Timer offers a compelling combination of striking JDM aesthetics and significant aviation heritage. The vibrant yellow hands, original signed bracelet, and Kanji day wheel make it a desirable configuration for collectors of early automatic chronographs.

History
The Seiko Speed-Timer designation was reserved exclusively for the Japanese Domestic Market, making these variants particularly sought-after compared to standard export models. The reference 6139-7012 is recognized for its robust helmet-style design and holds a notable military association, having been issued to Japanese Air Self-Defense Force (JASDF) jet fighter pilots during the 1970s. The watch is powered by the Caliber 6139, a historically significant automatic chronograph movement utilizing a vertical clutch and column wheel.

Payment and Shipping
Payment must be completed within 1–3 days after purchase.
Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind.
We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination.
Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age.
We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description.
The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use.
If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you.
As with all used watches, water resistance is not guaranteed.
If you have any questions, feel free to contact us after the auction ends.

/ Second Vintage

SKU: SEI-SXX-0026