Seiko Cal. 6650 - 712

Released in 1988, the Cal. 6650 with design code 712 was part of Seiko's domestic market collection. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-ec099ad61b48]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1988

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