Seiko Cal. 3878 - 997

The Seiko 3878-997 represents an important milestone in Seiko's 1981 lineup. With its 22mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-7c1dc2b88f22]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1981

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