Seiko Cal. 3870 - 651

The Seiko 3870-651 represents an important milestone in Seiko's 1975 lineup. With its 22mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-6991cc2857f5]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1975

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