Seiko Cal. 6628 - 831

This Hand-Winding model from 1987 features a 39mm Stainless Steel case. Powered by the 6628 caliber with 17j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-03fc0c936319]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1987

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