Seiko Cal. 6364 - 731

Released in 1978, the Cal. 6364 with design code 731 was part of Seiko's domestic market collection. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-a158ee70dc45]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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