Seiko Cal. 4537 - 258

This Automatic model from 1971 features a 41mm Hardlex-Coated Steel case. It features a Green dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-6a2b60842310]

Also known as: Sumo, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1971

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