Seiko Cal. 6640 - 111

The Seiko 6640-111 represents an important milestone in Seiko's 1974 lineup. It features a White dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-7bfd518cd62a]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1974

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