Seiko Cal. 6644 - 590

The Seiko 6644-590 represents an important milestone in Seiko's 1983 lineup. Powered by the 6644 caliber with 24j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-a52cac0623ff]

Also known as: UFO, Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1983

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