Seiko Cal. 3843 - 427

The Seiko 3843-427 represents an important milestone in Seiko's 1966 lineup. With its 18mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-11ad23dc9d26]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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