Seiko Cal. 6643 - 459

This Spring Drive model from 1978 features a 44mm Two-Tone case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-3c10117a3f95]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1978

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