Seiko Cal. 5644 - 663

The Seiko 5644-663 represents an important milestone in Seiko's 1968 lineup. Powered by the 5644 caliber with 36j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-db877d400c28]

Also known as: Panda, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1968

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