Seiko Cal. 6644 - 947

The Seiko 6644-947 represents an important milestone in Seiko's 1977 lineup. Powered by the 6644 caliber with 29j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-ed246fae5ddb]

Also known as: Turtle, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1977

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