Seiko Cal. 6640 - 866

The Seiko 6640-866 represents an important milestone in Seiko's 1985 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-b43f19396c04]

Also known as: Sportsmatic, Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1985

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