Seiko Cal. 3840 - 164

This Spring Drive model from 1984 features a 38mm Hardlex-Coated Steel case. Powered by the 3840 caliber with 18j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-885c41cfd171]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1984

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