Seiko Cal. 3870 - 528

The Seiko 3870-528 represents an important milestone in Seiko's 1965 lineup. Powered by the 3870 caliber with 25j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-dc24b8f2286d]

Also known as: Crown

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1965

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