Seiko Cal. 4591 - 690

The Seiko 4591-690 represents an important milestone in Seiko's 1987 lineup. With its 22mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-47ede1d03c32]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1987

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