Seiko Cal. 5630 - 387

This Hand-Winding model from 1966 features a 35mm PVD Black case. With its 18mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-f96557b3855c]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1966

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