Seiko Cal. 6660 - 699

The Seiko 6660-699 represents an important milestone in Seiko's 1973 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-d9120c66b1fb]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

33j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1973

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