Seiko Cal. 7177 - 987

This Spring Drive model from 1971 features a 45mm PVD Black case. With its 21mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-8aab0d5efc61]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1971

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