Seiko Cal. 6638 - 377

The Seiko 6638-377 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-67c938b7d36c]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1987

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