Seiko Cal. 6634 - 520

The 6634-520 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-ffdf2ffc79e5]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1967

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