Seiko Cal. 5231 - 372

The Seiko 5231-372 represents an important milestone in Seiko's 1992 lineup. Powered by the 5231 caliber with 30j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-818efaa9e72c]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1992

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