Seiko Cal. 3820 - 378

The Seiko 3820-378 represents an important milestone in Seiko's 1986 lineup. Powered by the 3820 caliber with 18j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-199b18e86d64]

Also known as: Tuna, Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1986

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