Seiko Cal. 6257 - 436

The Seiko 6257-436 represents an important milestone in Seiko's 1989 lineup. Powered by the 6257 caliber with 19j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-63cfb8c4354a]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1989

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