Seiko Cal. 3840 - 231

The Seiko 3840-231 represents an important milestone in Seiko's 1990 lineup. Powered by the 3840 caliber with 22j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-6c8fb3e620b5]

Also known as: World Timer, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1990

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