Seiko Cal. 6678 - 320

The Seiko 6678-320 represents an important milestone in Seiko's 1987 lineup. It features a Green dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-4f2169a592c0]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1987

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