Seiko Cal. 5618 - 640

The Seiko 5618-640 represents an important milestone in Seiko's 1992 lineup. It features a White dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-54193fc515e5]

Also known as: Silverwave

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1992

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