Seiko Cal. 0731 - 641

The Seiko 0731-641 represents an important milestone in Seiko's 1989 lineup. With its 21mm lug width and 14.7mm profile, it sits comfortably on most wrists. [seikata-wm-e021270fb65b]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1989

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