Seiko Cal. 7139 - 587

The Seiko 7139-587 represents an important milestone in Seiko's 1991 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-1de2aba857d6]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1991

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