Seiko Cal. 6640 - 617

The Seiko 6640-617 represents an important milestone in Seiko's 1996 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-14fd7256bcbd]

Also known as: Bullhead, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1996

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