Seiko Cal. 6640 - 147

The Seiko 6640-147 represents an important milestone in Seiko's 1974 lineup. With its 20mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-74758a6b874f]

Also known as: Pogue, Panda

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1974

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