Seiko Cal. 5657 - 765

The Seiko 5657-765 represents an important milestone in Seiko's 1979 lineup. Powered by the 5657 caliber with 26j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-7eeade4db3a4]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1979

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