Seiko Cal. 3878 - 313

The Seiko 3878-313 represents an important milestone in Seiko's 1976 lineup. Powered by the 3878 caliber with 31j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-b7144733c082]

Also known as: UFO, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1976

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