Seiko Cal. 6686 - 731

This Hand-Winding model from 1968 features a 36mm PVD Black case. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-7884fedb2ff4]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1968

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