Seiko Cal. 4427 - 731

The Seiko 4427-731 represents an important milestone in Seiko's 1967 lineup. It features a Silver dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-8e7d1974fd23]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1967

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