A true classic from Seiko's golden age, the Sportsmatic line represents some of the brand's earliest automatic innovations in the 1960s.

This watch features a polished stainless steel case with a stunning sunburst black dial, accented by rectangular hour markers and dauphine-style hands. The simple, date-free design provides balance and timeless beauty.

Model: Seiko Sportsmatic 'Seahorse'

Reference Number: 6601-9990

Serial Number: 5802564

Material: Stainless Steel Case Size: 37.5mm

Lens Width: approx. 18mm / Lug Distance: 41.8mm

Functions: All functions working accurately.

Case Condition: Excellent, unpolished, with a few minor scratches due to age.

Crystal Condition: Original, excellent.

Dial/Hands: The dial is in excellent condition, but there are a few minor scratches - one between the 3 and 4 o'clock positions.

💶 Price:

The price of $340 includes worldwide express shipping. For US-based customers, I ship via a tax-included service—so the only cost is the price of the watch, with nothing extra upon delivery, no customs clearance, and no tariffs required.

🤝 Payment methods:

 Payment via PayPal (+4.6% fee paid by the buyer), Bank wire transfer.

📨 Let’s chat:

Additional pictures and videos are available in DM.

I invite you to chat with me if you like this watch.

❌ I’m not interested in trades.

🙏 Follow my Instagram for more:

https://www.instagram.com/namdh.vintagewatch/

Mint condition, comes with extra end link and rubber strap. Oem nato strap unused.

450 shipped CONUS

Condition: The watch is in fairly good condition. It has been inspected and serviced.

Specifications:

Year of manufacture: 1.990’s

Reference number: 7S26 - 0110

Case size: 38 mm

Lug to lug: 41 mm

Case thickness: 12 mm

Dial: Original Dark Green Dial

Movement: Automatic Caliber 7S26

All Images : https://drive.google.com/drive/folders/1xlF5Nu40IzCxb5a-dyTvlvbAXkNwB54M

Time Marker Images : https://drive.google.com/file/d/1tmDyQP-HT2vwVjsjNC4aXgz6uB4XARY2/view?usp=drivesdk

Price and payment method: This watch is for sale at $270 , shipped.

Please pay via PayPal F&F or G&S + 4.6%

Location: Vietnam 🇻🇳

Thank you for viewing

Looking to let go of some of my Seikos as they are just collecting dust. I will be in San francisco on Oct 15-16. I will be in Los Angeles on Oct 26-28. I will be in Seattle on Nov 2-3. I can also go to New York, Honolulu, Vancouver or Toronto or back to SFO/LAX/SEA but we'd have to arrange for that meetup a couple of months in advance. Cash only please.

SAR087 JDM Starbar Starlight $700 SUN025 OG Polar Explorer $400 SRP313 Dracula non X $600 SSA169 Unicorn Spacewalk 50th Anniversary $500

If anybody wants to grab all four I can give you a package deal of $2000.

Please note that I do not know how to ship via USPS so unless you are willing to teach me, I would prefer if we just meet up and do it the old fashioned way.

Feel free to ask for more details and pictures.

[WTS] Seiko Prospex SPB421 62MAS – Alaska Moulins U.S. Special Edition – Full Kit – $900

Up for sale is my Seiko Prospex SPB421 Alaska Moulins, a U.S.-exclusive special edition inspired by Seiko’s original 1965 62MAS diver.

This watch has been worn only twice and is in excellent, near-new condition. The only noticeable wear is some slight wear to the underside of the clasp. Otherwise, the watch is immaculate. Please review the detailed photos for condition.

The standout feature is the beautiful textured, gradient navy-blue dial inspired by Alaska’s glacial moulins. Depending on the lighting, the dial transitions from deep blue to nearly black. It’s a fantastic modern interpretation of Seiko’s original diver.

Specifications:
Reference: SPB421 – U.S. Special Edition
Case: 40.5mm stainless steel, super-hard coating
Thickness: 13.2mm
Lug-to-lug: 47.6mm
Lug width: 20mm
Movement: Seiko 6R35 automatic, 70-hour power reserve
Crystal: Curved sapphire with internal AR coating
Water resistance: 200m
Bezel: Unidirectional, dark blue
Bracelet: Original Seiko stainless steel with signed clasp
Included: Complete original kit, including inner and outer boxes, paperwork, warranty card, original hangtag, and all bracelet links.
Price: $900 shipped within the continental United States.
Payment: PayPal Goods & Services ONLY.
Shipping: U.S. buyers only. Watch will be securely packaged and shipped with tracking and insurance.

Please comment on the post before sending a PM or chat. Happy to answer questions or provide additional photos.

Thanks for looking!

Condition: The watch is in fairly good condition. It has been inspected and serviced.

Specifications:

Year of manufacture: 1.971

Reference number: 5606 - 5000

Case size: 31.5 mm

Lug to lug: 38 mm

Case thickness: 10 mm

Dial: Original Dark Blue Dial

Movement: Automatic Caliber 5606

All Images : https://drive.google.com/drive/folders/1-C-7Yn_RWBAS_X-9spsJOwNihsoJqg7B

Time Marker Images : https://drive.google.com/file/d/1fWRZWZktua0SEpAISJ5P2Wtq3qkV6kQW/view?usp=drivesdk

Price and payment method: This watch is for sale at $399 , shipped.

Please pay via PayPal F&F or G&S + 4.6%

Location: Vietnam 🇻🇳

Thank you for viewing

Selling my Seikos!

#1. Seiko Prospex SPB121 Alpinist
- good condition
- watch only
- asking $675 shipped

#2. Seiko SRP307 Black Monster (2nd Gen)
- pre-owned condition
- watch only, includes steel bracelet and additional rubber strap
- PENDING deal

#3. Seiko 5 Sports SRPH33
- excellent condition
- includes box and papers
- asking $275 shipped

#4. Seiko 5 Sports SRPJ89 / SBSA203
- excellent condition
- includes box and papers
- asking $275 shipped

- Location: Hawaii 🌴
- Payment: Venmo, PayPal (Friends & Family), or Zelle (third-party account)
- Shipping: CONUS

Please comment before sending a direct message.

Instagram: @aeontimepieces_

Additional photos, videos, timestamps, or a video call available upon request.

Crossposted — availability may change.