Seiko Cal. 6638 - 725

The Seiko 6638-725 represents an important milestone in Seiko's 1984 lineup. It features a Green dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-0964479e5c1a]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1984

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