Seiko Cal. 6640 - 201

The Seiko 6640-201 represents an important milestone in Seiko's 1984 lineup. It features a Cream dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-3815c3419396]

Also known as: World Timer, Crown

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1984

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