Seiko Cal. 5640 - 855

This Automatic model from 1966 features a 41mm Two-Tone case. It features a Navy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-e9e4031f8b26]

Also known as: Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1966

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