Seiko Cal. 6640 - 273

The Seiko 6640-273 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-1e3fb49ecdf3]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1969

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