Seiko Cal. 5660 - 316

The Seiko 5660-316 represents an important milestone in Seiko's 1977 lineup. With its 20mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-a074933caee2]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Champagne

Jewels

26j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1977

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