Seiko Cal. 5630 - 731

This Automatic model from 1970 features a 38mm PVD Black case. It features a Champagne dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-5d448929a42d]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1970

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