Seiko Cal. 3865 - 347

The Seiko 3865-347 represents an important milestone in Seiko's 1978 lineup. With its 22mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-caf3cfbd47b7]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1978

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