Seiko Cal. 6638 - 377

The Seiko 6638-377 represents an important milestone in Seiko's 1987 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-f9ee079ed130]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1987

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