Seiko Cal. 6311 - 902

This Spring Drive model from 1978 features a 40mm Stainless Steel case. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-b58fb45cc94b]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1978

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