Seiko Cal. 4436 - 284

This Spring Drive model from 1988 features a 45mm Hardlex-Coated Steel case. It features a Navy dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-4d798b245dfa]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1988

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