Seiko Cal. 3815 - 331

The Seiko 3815-331 represents an important milestone in Seiko's 1973 lineup. With its 20mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-73668178cd5d]

Also known as: Panda, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1973

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