Seiko Cal. 6318 - 559

This Spring Drive model from 1977 features a 42mm Stainless Steel case. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-613e3d13e7e2]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1977

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