Seiko Cal. 6640 - 665

The Seiko 6640-665 represents an important milestone in Seiko's 1980 lineup. With its 22mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-85cc56c5ded9]

Also known as: Goldfeather, World Timer

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1980

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