Seiko Cal. 6646 - 206

The Seiko 6646-206 represents an important milestone in Seiko's 1973 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-50a6ce4b2927]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1973

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