Seiko Cal. 6640 - 479

The Seiko 6640-479 represents an important milestone in Seiko's 1989 lineup. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-26f183ce1f06]

Also known as: Goldfeather, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1989

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