Seiko Cal. 6391 - 751

This Hand-Winding model from 1976 features a 43mm Stainless Steel case. With its 20mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-7be4ffbd8bf6]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1976

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