Seiko Cal. 6642 - 721

The Seiko 6642-721 represents an important milestone in Seiko's 1998 lineup. It features a Navy dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-2440ec103016]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1998

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