Seiko Cal. 6630 - 378

The Seiko 6630-378 represents an important milestone in Seiko's 1983 lineup. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-20905f9a5607]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1983

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