Seiko Cal. 6330 - 521

The Seiko 6330-521 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-6e4c9558a47e]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1966

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