Seiko Cal. 6637 - 387

This Automatic model from 1970 features a 37mm PVD Black case. With its 18mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-74d9ab0c9690]

Also known as: Navigator, Arnie

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1970

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