Seiko Cal. 6617 - 660

This Spring Drive model from 1973 features a 42mm PVD Black case. With its 18mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-dfa05a5dd0a1]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1973

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