Seiko Cal. 6638 - 490

The Seiko 6638-490 represents an important milestone in Seiko's 1991 lineup. It features a White dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-03692225a643]

Also known as: World Timer, Arnie

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1991

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