Seiko Cal. 6639 - 570

The Seiko 6639-570 represents an important milestone in Seiko's 1971 lineup. It features a White dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-e502781fdf00]

Also known as: Rally, World Timer

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1971

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