Seiko Cal. 6221 - 431

The Seiko 6221-431 represents an important milestone in Seiko's 1967 lineup. Powered by the 6221 caliber with 33j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-2b7e356a4e4f]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1967

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