Seiko Cal. 6657 - 394

This Spring Drive model from 1995 features a 40mm Stainless Steel case. With its 21mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-af4e1fdce120]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1995

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