Seiko Cal. 6660 - 731

The 6660-731 is a sought-after Automatic piece from Seiko's golden era. With its 19mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-a10edfc00ada]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1974

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