Seiko Cal. 6311 - 557

This Quartz model from 1979 features a 35mm Hardlex-Coated Steel case. With its 22mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-5ce146fb0030]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1979

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