Seiko Cal. 5666 - 778

The Seiko 5666-778 represents an important milestone in Seiko's 1985 lineup. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-dd18c14e5f06]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1985

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