Seiko Cal. 6631 - 333

The 6631-333 is a sought-after Hand-Winding piece from Seiko's golden era. With its 22mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-c491bc00dcab]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1966

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