Seiko Cal. 6366 - 321

Released in 1970, the Cal. 6366 with design code 321 was part of Seiko's domestic market collection. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-656af74fcf45]

Also known as: Sumo, Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1970

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