Seiko Cal. 5631 - 228

The Seiko 5631-228 represents an important milestone in Seiko's 1988 lineup. It features a Silver dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-f8ceb3b7419d]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1988

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