Seiko Cal. 6643 - 410

The Seiko 6643-410 represents an important milestone in Seiko's 1999 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-1d883863ca5a]

Also known as: Sumo, Silverwave

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1999

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