Seiko Cal. 6647 - 824

The 6647-824 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-f6a8b8b8ec00]

Also known as: Helmet, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

34j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1975

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