Seiko Cal. 4456 - 256

This Spring Drive model from 1968 features a 41mm Hardlex-Coated Steel case. It features a Burgundy dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-6c140b42a900]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

22j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1968

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