Seiko Cal. 6640 - 532

The Seiko 6640-532 represents an important milestone in Seiko's 1993 lineup. It features a Silver dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-0f227e474274]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1993

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