Seiko Cal. 6640 - 695

The Seiko 6640-695 represents an important milestone in Seiko's 1999 lineup. With its 21mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-9784a424ebfe]

Also known as: Bullhead, UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1999

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