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SSK001

Seiko

SSK001

Also sold as SSK001J1Japan SSK001K1International

In production All SSK references →
Caliber
4R34
Case diameter
42.5mm
Water resistance
100 m
Power reserve
41h

Seiko SSK001: caliber 4R34, 42.5 mm case, 100 m water resistance.

Where to buy

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Specifications

Specifications from Creation Watches, Seiko, last seen 2026-09-24.

Movement

Caliber
4R34 All 4R34 watches →
Movement
Automatic
Power reserve
41h
Jewels
24

Case & crystal

Case material
Stainless steel
Case diameter
42.5mm
Case thickness
13.6mm
Lug to lug
46mm
Lug width
22mm
Crystal
Hardlex with magnified glass

Resistance

Water resistance
100 m
Magnetic resistance
4,800 A/m

Catalogue

Family
SSK
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Variants Same watch, different market or bracelet

Reference Edition Region Band Clasp Weight
SSK001J1 J1 Japan Stainless steel Fold over clasp —
SSK001K1 K1 International Stainless steel Three-fold clasp with push button release 161g

More Seiko SSK references