Seiko Cal. 6640 - 880

The Seiko 6640-880 represents an important milestone in Seiko's 1971 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-1adda91131e5]

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

26j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1971

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