Seiko Cal. 4439 - 331

This Hand-Winding model from 1975 features a 34mm PVD Black case. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-45975ec46b08]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1975

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