Seiko Cal. 6636 - 864

The Seiko 6636-864 represents an important milestone in Seiko's 1970 lineup. Powered by the 6636 caliber with 31j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-6348adc6e2a5]

Also known as: Silverwave, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1970

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