Seiko Cal. 5657 - 418

This Spring Drive model from 1980 features a 43mm Hardlex-Coated Steel case. It features a White dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-4f28400ff5aa]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1980

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