Seiko Cal. 7181 - 639

This Automatic model from 1979 features a 37mm PVD Black case. It features a Navy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-ea92c2328db0]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1979

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