Seiko Cal. 6643 - 736

This Spring Drive model from 1990 features a 45mm Gold-Plated case. Powered by the 6643 caliber with 21j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-3e21c66625b6]

Also known as: Bellmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1990

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