Seiko Cal. 6636 - 731

The 6636-731 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6636 caliber with 21j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-79316266db86]

Also known as: World Timer, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1986

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