Seiko Cal. 6640 - 796

The Seiko 6640-796 represents an important milestone in Seiko's 1997 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-c33ad09ab352]

Also known as: Monster, Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1997

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