Seiko Cal. 5631 - 525

This Quartz model from 1987 features a 46mm Hardlex-Coated Steel case. It features a Black dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-dfdad415d26c]

Also known as: Helmet, Arnie

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1987

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