Seiko Cal. 3840 - 250

This Automatic model from 1972 features a 43mm Hardlex-Coated Steel case. Powered by the 3840 caliber with 22j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-6c9133f79a2b]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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