Seiko Cal. 6364 - 531

The Seiko 6364-531 represents an important milestone in Seiko's 1978 lineup. Powered by the 6364 caliber with 30j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-baa381d1da31]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1978

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