Seiko Cal. 5640 - 271

The Seiko 5640-271 represents an important milestone in Seiko's 1991 lineup. Powered by the 5640 caliber with 28j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-9122eedf2b11]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1991

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