Seiko Cal. 6647 - 760

The 6647-760 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-28ce5b38db1e]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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