Seiko Cal. 6640 - 970

The 6640-970 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-de4361dac052]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1999

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