Seiko Cal. 5657 - 634

The Seiko 5657-634 represents an important milestone in Seiko's 1986 lineup. Powered by the 5657 caliber with 32j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-ca70ac4bc09e]

Also known as: UFO, Navigator

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1986

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