Seiko Cal. 6640 - 181

The Seiko 6640-181 represents an important milestone in Seiko's 1995 lineup. It features a Silver dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-b658158f6e42]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1995

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