Seiko Cal. 6340 - 470

This Spring Drive model from 1981 features a 39mm Hardlex-Coated Steel case. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-b2c9e9bd0a9a]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1981

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