Seiko Cal. 0721 - 306

The Seiko 0721-306 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-5f9bd3d2799c]

Also known as: Shogun, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1979

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