Seiko Cal. 6638 - 594

The Seiko 6638-594 represents an important milestone in Seiko's 1987 lineup. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-e6e6e386f878]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1987

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