Seiko Cal. 3865 - 770

The Seiko 3865-770 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-8c9a993c0849]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1972

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