Seiko Cal. 6377 - 428

This Hand-Winding model from 1987 features a 35mm PVD Black case. Powered by the 6377 caliber with 31j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-babe81f73964]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1987

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