Seiko Cal. 5240 - 581

Released in 1972, the Cal. 5240 with design code 581 was part of Seiko's domestic market collection. Powered by the 5240 caliber with 28j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-b3c6eab91af5]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1972

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