Seiko Cal. 5257 - 631

The Seiko 5257-631 represents an important milestone in Seiko's 1990 lineup. Powered by the 5257 caliber with 17j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-b2d431f98b38]

Also known as: World Timer, Arnie

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1990

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