Seiko Cal. 6378 - 431

The Seiko 6378-431 represents an important milestone in Seiko's 1990 lineup. It features a Green dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-6b27b0e3332f]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1990

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