Seiko Cal. 6658 - 937

The Seiko 6658-937 represents an important milestone in Seiko's 1989 lineup. Powered by the 6658 caliber with 27j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-7d0d640652f7]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1989

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