Seiko Cal. 6640 - 681

This Hand-Winding model from 1966 features a 36mm Two-Tone case. With its 21mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-7ac41a33664b]

Also known as: Goldfeather, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1966

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