Seiko Cal. 5231 - 167

The Seiko 5231-167 represents an important milestone in Seiko's 1987 lineup. Powered by the 5231 caliber with 26j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-74ed3cd5ac5d]

Also known as: UFO, Bellmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1987

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