Seiko Cal. 5638 - 350

This Quartz model from 1967 features a 44mm PVD Black case. Powered by the 5638 caliber with 32j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-a0a52223c9dd]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1967

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