Seiko Cal. 6257 - 645

The Seiko 6257-645 represents an important milestone in Seiko's 1992 lineup. Powered by the 6257 caliber with 29j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-b174ef902ed3]

Also known as: Sportsmatic, Crown

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1992

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