Seiko Cal. 6644 - 143

The Seiko 6644-143 represents an important milestone in Seiko's 1968 lineup. Powered by the 6644 caliber with 19j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-f39fc9775ac2]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1968

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