Seiko Cal. 6630 - 764

The Seiko 6630-764 represents an important milestone in Seiko's 1995 lineup. It features a Green dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-6991b3499f27]

Also known as: Helmet, UFO

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1995

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