Seiko Cal. 6620 - 664

The Seiko 6620-664 represents an important milestone in Seiko's 1997 lineup. Powered by the 6620 caliber with 30j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-1b3f8a12ddc4]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1997

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