Seiko Cal. 5666 - 721

This Automatic model from 1977 features a 37mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-36be50845b8a]

Also known as: Bullhead, UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

35j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1977

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