Seiko Cal. 5661 - 707

This Spring Drive model from 1985 features a 44mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-00fb9f1fa671]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1985

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