Seiko Cal. 4427 - 865

This Spring Drive model from 1965 features a 37mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-41f6c973f9ae]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1965

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