Seiko Cal. 6661 - 617

This Spring Drive model from 1972 features a 45mm Hardlex-Coated Steel case. With its 18mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-476f28c43891]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1972

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