Seiko Cal. 5638 - 757

The Seiko 5638-757 represents an important milestone in Seiko's 1985 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-b5b1cd597b6a]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1985

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