Seiko Cal. 6658 - 408

This Quartz model from 1978 features a 40mm PVD Black case. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-b8852598fb12]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1978

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