Seiko Cal. 5630 - 687

This Hand-Winding model from 1978 features a 40mm Gold-Plated case. Powered by the 5630 caliber with 25j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-8e7700a095ef]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1978

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