Seiko Cal. 6639 - 598

The Seiko 6639-598 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-6c8c8f88201c]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1966

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