Seiko Cal. 6661 - 987

Released in 1972, the Cal. 6661 with design code 987 was part of Seiko's domestic market collection. It features a White dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-ab2939aee6ad]

Also known as: Tuna, Navigator

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1972

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