Seiko Cal. 3840 - 978

The Seiko 3840-978 represents an important milestone in Seiko's 1989 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-e223206925d3]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1989

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