Seiko Cal. 5640 - 872

The Seiko 5640-872 represents an important milestone in Seiko's 1980 lineup. Powered by the 5640 caliber with 36j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-079818ed6ed6]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1980

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