Seiko Cal. 3870 - 818

The Seiko 3870-818 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-0105e9f3f1d8]

Also known as: Rally, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1972

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