Seiko Cal. 6640 - 687

The Seiko 6640-687 represents an important milestone in Seiko's 1995 lineup. It features a Silver dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-72f35d31b279]

Also known as: Samurai, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1995

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