Seiko Cal. 6644 - 690

The 6644-690 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6644 caliber with 31j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-559243a70cd8]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1992

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