Seiko Cal. 6646 - 258

This Spring Drive model from 1995 features a 37mm Stainless Steel case. With its 18mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-f78237eb229f]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

30j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1995

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