Seiko Cal. 5623 - 731

The Seiko 5623-731 represents an important milestone in Seiko's 1979 lineup. Powered by the 5623 caliber with 32j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-a8b1c5950402]

Also known as: World Timer, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1979

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