Seiko Cal. 5257 - 989

The Seiko 5257-989 represents an important milestone in Seiko's 1986 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-a3be8fb9b34d]

Also known as: Monster, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1986

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