Kensington Watches
Seiko 'Japanese Zen Gardens' in Fern Green 41.8mm Mens Watch Limited Edition

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Seiko

Seiko 'Japanese Zen Gardens' in Fern Green 41.8mm Mens Watch Limited Edition

Ref. SSA463J1

Among our 218 Seiko watchesThis watch£500
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Stepping up in the same colour and case shape

Price range £110 to £3,550 across 218 Seiko watches in stock.

The dial is the centrepiece here: a deep fern green surface with a three-dimensional Karesansui pattern — the raked sand and gravel motif of a Japanese dry garden — finished to a high gloss. An open-heart aperture at nine o'clock reveals the automatic 4R39 calibre beneath, with a gold-coloured seconds hand sweeping across it. Curved minute and seconds hands sit above the dial, their hands treated with LumiBrite. A dual-curve sapphire crystal covers everything, and the case measures 41.8mm in stainless steel, worn on a matching bracelet with a three-fold clasp.

Reference
SSA463J1
Brand
Seiko
Case size
41.8mm
Case thickness
12.5mm
Lug width
20mm
Case material
Stainless steel
Case shape
Round
Dial
Green
Crystal
Sapphire
Movement
Automatic
Calibre
4R39
Functions
Skeleton dial
Water resistance
30m
Bracelet / strap
Stainless steel bracelet
Strap colour
Silver
Clasp
Deployant clasp
Lume
LumiBrite
Retailer
Mappin & Webb
Additional specifications
Lug-to-lug
48.4mm
Power reserve
41 hours
Learn more about Seiko

Kintaro Hattori opened a watch and clock shop in Tokyo in 1881, aged twenty-one, and began manufacturing under the name Seikosha — roughly, house of exquisite workmanship — in 1892. The Seiko name appeared on watches from 1924.

The company's significance is that it broke the Swiss monopoly twice. First on precision: Seiko was appointed official timekeeper of the 1964 Tokyo Olympics and built the quartz chronometers and printing timers to do it, and in the 1960s its movements placed highly at the Neuchâtel and Geneva observatory trials against the best Swiss houses.

Then on technology. On Christmas Day 1969 Seiko released the Astron, the world's first quartz wristwatch, accurate to five seconds a month where mechanical watches managed that per day. The consequences for Switzerland were catastrophic — employment in the Swiss industry fell by roughly two-thirds over the following decade. Seiko deliberately did not enforce its quartz patents, allowing the technology to spread.

The same year it produced the 6139, among the first automatic chronographs, and it has since introduced Kinetic, Spring Drive — a hybrid regulating a mechanical mainspring electronically, giving a perfectly gliding seconds hand — and its own dive and field lines.

Seiko remains fully vertically integrated, making its own hairsprings, quartz crystals, and even the Zaratsu-polished cases, at price points from under a hundred pounds upward.

1881
Kintaro Hattori opens his Tokyo shop.
1924
The first watches carry the Seiko name.
1964
Official timekeeper of the Tokyo Olympics.
1969
The Astron becomes the first quartz wristwatch.
1999
Spring Drive enters production.

All Seiko watches

Temporarily out of stock

Mappin & Webb is not currently taking orders for this reference. Last listed as available on 24 September 2026. Stock is checked nightly and this page updates when it returns.

Out of stock

What the specifications mean

A mechanical watch for everyday wear.

Strengths

  • 48.4mm lug-to-lug keeps the 41.8mm case wearable
  • Sapphire crystal, which resists scratching
  • Luminous hands and markers for low light

Worth knowing

  • 30m means keeping it away from water
Best forEveryday wear
Less suited toWater

Price history

This watch is currently at its highest recorded price. It was £480 on 10 August. Prices are checked every day, and we record any changes.

£500£50010 August

Your new watch

Frequently asked questions, and things you should know about this watch

Can I swim with it?

No. At 30m it will survive rain and handwashing, but not submersion of any kind.

Water resistance explained

Will the glass scratch?

Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.

Sapphire, mineral and acrylic compared

Does it need a battery?

No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.

Quartz, automatic and solar compared

How long does it run for when it's not worn?

About 41 hours fully wound — enough to survive a night off the wrist, but not a full weekend.

What size strap does it take?

20mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.

Will it fit my wrist?

Lug-to-lug is 48.4mm, which suits wrists from roughly 16.5cm (6½ inches) upward.

Lug-to-lug decides fit more than case diameter does.

How to size a watch to your wrist

Is it a men's or women's watch?

Listed as men's.

Has the price changed recently?

It's currently at its highest recorded price. It's ranged between £480 and £500, today it's £500.

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