Description

For sale is an exceptionally rare and highly collectible Seiko SARL001, offered here in NOS (New Old Stock) condition, a truly scarce find for a watch of this age.

This model represents a unique moment in Seiko’s history and is widely regarded as the only high-end open-heart watch ever produced by Seiko, making it particularly desirable among collectors.

At its heart is the caliber 8L38, effectively an undecorated variant of the Grand Seiko 9S55, assembled at the renowned Shizukuishi Watch Studio in Japan, the very same facility responsible for mechanical Grand Seiko production.

The dial features a refined open-heart complication, offering a captivating view of the balance wheel in motion. Combined with Zaratsu polished surfaces and a sapphire crystal, the watch delivers a distinctly premium, high-end feel.

When introduced around 2007, this model retailed for close to $2,000 USD, firmly positioning it in Seiko’s high-end segment at the time.

The watch comes fitted on a brand-new, bespoke strap handcrafted by Italian artisan, using the finest vegetable-tanned leather. It is entirely made by hand, offering a premium feel and quality that perfectly complements this historic timepiece. You can view the maker's work and the level of craftsmanship here:

https://www.instagram.com/mtstraps/

Specifications:
- Seiko SARL001
- Serial number: 860001
- Movement: 8L38
- Case: 316L Stainless Steel
- Sapphire crystal with Anti-Reflective coating
- Water Resistance: 100 m
- Condition: S (Like New) - See full details below

- Year: 2008
- Service completed in 2025

Dimensions:
- Case Diameter: 40.5mm
- Lug Width: 20mm
- Lug to Lug 46.5mm
- Wrist circumference: up to 21 cm

High resolution photos:
https://imgur.com/a/HUGRfZ6

YouTube video:

***********************************************

Hi there! I’m a long-time watch enthusiast and collector with over 20 years of experience in the hobby. I’m mainly into Japanese watches: Grand Seiko, high-end Seiko, Casio Oceanus — basically anything that offers great value and proper watchmaking without the silly price tags. I like watches that punch above their weight, and that’s exactly the type I tend to buy, wear, and sell.

Every watch I sell is carefully inspected and photographed by me. I take pride in showing the watch honestly — no hidden marks, no stock photos, no surprises. What you see in the pictures is exactly what you’ll receive.

I’m based in Lixnaw, Co. Kerry and have built a solid track record here on Adverts.ie for being straightforward, reliable, and easy to deal with. I don’t entertain lowballing, as my prices are already fair. Lowballers and other 'exotic offer' experts, please ignore this sale.
And just to be fully clear: I’m not looking for swaps or part exchanges. I prefer straight cash sales only.

All my watches are graded using my standardised condition scale:

N (New) — unworn condition. Typically includes full set (box, papers, tags).

S (Like New) — almost indistinguishable from new. No visible scratches or marks. Crystal and case flawless.

A (Excellent) — Lightly worn with minimal signs of use. Minor hairline scratches visible only on close inspection.

V (Very good) — Gently used with only minor signs of use; the crystal may carry minor traces consistent with normal wear, but they do not stand out. Overall condition remains clean and attractive.

B (Good) — Regularly worn with moderate signs of use. Noticeable scratches on case or bracelet; crystal may have faint marks but remains in good condition.

C (Fair) — Clearly worn with pronounced scratches, dings, or crystal marks. Functional but cosmetic wear is obvious; may benefit from servicing.

Cheers!
Jake