Seiko Cal. 5618 - 393

The Seiko 5618-393 represents an important milestone in Seiko's 1970 lineup. With its 21mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-35a6c71a36b2]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1970

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