Seiko Cal. 6644 - 931

This Spring Drive model from 1999 features a 39mm Gold-Plated case. Powered by the 6644 caliber with 28j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-a0db9444fc42]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1999

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