Seiko Cal. 5644 - 264

The Seiko 5644-264 represents an important milestone in Seiko's 1969 lineup. Powered by the 5644 caliber with 21j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-1fffc6d1b2a5]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1969

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