Seiko Cal. 3870 - 307

This Kinetic model from 1973 features a 34mm PVD Black case. Powered by the 3870 caliber with 25j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-61025fef21d6]

Also known as: UFO, Bellmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1973

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