Seiko Cal. 3870 - 865

This Hand-Winding model from 1972 features a 40mm Stainless Steel case. Powered by the 3870 caliber with 32j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-88355e6db81a]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1972

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