Seiko Cal. 5231 - 671

The Seiko 5231-671 represents an important milestone in Seiko's 1978 lineup. Powered by the 5231 caliber with 19j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-69fd3c2b70f5]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1978

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