Seiko Cal. 6650 - 370

This Spring Drive model from 1971 features a 43mm PVD Black case. With its 22mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-cc291855e6ec]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1971

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