Seiko Cal. 6640 - 243

The 6640-243 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-0003b26476db]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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