Seiko Cal. 6331 - 378

The Seiko 6331-378 represents an important milestone in Seiko's 1972 lineup. Powered by the 6331 caliber with 27j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-e2adc28bd5e2]

Also known as: Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1972

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