Seiko Cal. 4557 - 991

The Seiko 4557-991 represents an important milestone in Seiko's 1985 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-4424300ee6d6]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

42mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1985

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