Seiko Cal. 5257 - 991

The Seiko 5257-991 represents an important milestone in Seiko's 1981 lineup. Powered by the 5257 caliber with 31j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-8caad6ed687a]

Also known as: Crown, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1981

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