Seiko Cal. 5660 - 685

Released in 1977, the Cal. 5660 with design code 685 was part of Seiko's domestic market collection. It features a Navy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-cdfa449bac21]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1977

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