Seiko Cal. 4450 - 645

This Spring Drive model from 1966 features a 37mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-18d2024ec48b]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1966

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