Seiko Cal. 6331 - 321

The Seiko 6331-321 represents an important milestone in Seiko's 1970 lineup. Powered by the 6331 caliber with 17j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-bbeba617144e]

Also known as: Sea Horse, Emperor

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1970

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