Seiko Cal. 6644 - 658

The Seiko 6644-658 represents an important milestone in Seiko's 1977 lineup. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-da49bb11873b]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1977

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