Seiko Cal. 5257 - 770

The Seiko 5257-770 represents an important milestone in Seiko's 1983 lineup. Powered by the 5257 caliber with 18j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-eaab93e2a34a]

Also known as: Sumo, Crown

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1983

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