Seiko Cal. 6628 - 643

The Seiko 6628-643 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-632c6ff59e05]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1972

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