Seiko Cal. 3860 - 999

This Automatic model from 1973 features a 41mm Hardlex-Coated Steel case. Powered by the 3860 caliber with 21j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-4fbb4ab58b2e]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1973

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