Seiko Cal. 5661 - 178

The Seiko 5661-178 represents an important milestone in Seiko's 1971 lineup. It features a Green dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-6e4d5373d229]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1971

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