Seiko Cal. 3859 - 240

The Seiko 3859-240 represents an important milestone in Seiko's 1991 lineup. Powered by the 3859 caliber with 24j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-3fb3086963ee]

Also known as: Tuna, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1991

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