Seiko Cal. 6649 - 278

The Seiko 6649-278 represents an important milestone in Seiko's 1988 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-4e746e870630]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1988

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