Seiko Cal. 5640 - 159

The Seiko 5640-159 represents an important milestone in Seiko's 1991 lineup. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-51df49cbe50d]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1991

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