Seiko Cal. 0766 - 441

This Spring Drive model from 1973 features a 36mm PVD Black case. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-0f2d29f59c20]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

32j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1973

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