Seiko Cal. 5640 - 237

This Spring Drive model from 1989 features a 46mm Stainless Steel case. It features a White dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-e4a299732dab]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1989

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