Seiko Cal. 6657 - 860

The Seiko 6657-860 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-f3ff9e29a88f]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1973

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