Seiko Cal. 6364 - 964

The Seiko 6364-964 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-677348c65af7]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1979

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