Seiko Cal. 5640 - 476

The 5640-476 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5640 caliber with 34j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-2e9f71efa01c]

Also known as: Helmet, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1970

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