Seiko Cal. 6643 - 359

The Seiko 6643-359 represents an important milestone in Seiko's 1974 lineup. Powered by the 6643 caliber with 29j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-12a1398a102e]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Burgundy

Jewels

29j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1974

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