Seiko Cal. 6661 - 186

This Spring Drive model from 1967 features a 37mm Hardlex-Coated Steel case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-9df03cdce761]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1967

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