Seiko Cal. 4561 - 188

This Spring Drive model from 1997 features a 37mm Titanium case. Powered by the 4561 caliber with 19j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-9f8a280f717e]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1997

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