Seiko Cal. 6647 - 351

The Seiko 6647-351 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-567fe416fd46]

Also known as: Samurai, Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1970

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