Seiko Cal. 6638 - 652

The Seiko 6638-652 represents an important milestone in Seiko's 1989 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-29f62d7f1e42]

Also known as: World Timer, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1989

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