Seiko Cal. 4531 - 229

The Seiko 4531-229 represents an important milestone in Seiko's 1966 lineup. Powered by the 4531 caliber with 23j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-85d38bb395c1]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1966

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