Seiko Cal. 5257 - 991

The Seiko 5257-991 represents an important milestone in Seiko's 1975 lineup. Powered by the 5257 caliber with 29j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-f76b1db37b52]

Also known as: Tuna, Silverwave

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1975

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