Seiko Cal. 6647 - 810

The Seiko 6647-810 represents an important milestone in Seiko's 1988 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-f69a14d4b64c]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1988

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