Seiko Cal. 5657 - 287

This Hand-Winding model from 1998 features a 40mm Two-Tone case. Powered by the 5657 caliber with 27j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-a4cdadc38edc]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1998

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