Seiko Cal. 3840 - 924

The Seiko 3840-924 represents an important milestone in Seiko's 1985 lineup. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-fe6c7cc33a70]

Also known as: UFO, Bellmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1985

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