Seiko Cal. 5660 - 677

Released in 1971, the Cal. 5660 with design code 677 was part of Seiko's domestic market collection. With its 19mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-f4adb7eed718]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1971

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