Seiko Cal. 6657 - 590

The Seiko 6657-590 represents an important milestone in Seiko's 1971 lineup. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-9fa2b78c91ae]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1971

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