Seiko Cal. 5664 - 235

This Spring Drive model from 1978 features a 36mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-d51360a57cc9]

Also known as: UFO, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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