Seiko Cal. 4558 - 639

The Seiko 4558-639 represents an important milestone in Seiko's 1979 lineup. It features a Green dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-0241cbdda922]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1979

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