Seiko Cal. 3870 - 509

The Seiko 3870-509 represents an important milestone in Seiko's 1979 lineup. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-82e76c4eb030]

Also known as: Rally, World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1979

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