Seiko Cal. 6644 - 561

The Seiko 6644-561 represents an important milestone in Seiko's 1987 lineup. Powered by the 6644 caliber with 23j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-a1d5a547bf01]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1987

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