Seiko Cal. 0721 - 557

This Spring Drive model from 1986 features a 35mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-d5ad9c1d3763]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1986

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