Seiko Cal. 3813 - 531

The Seiko 3813-531 represents an important milestone in Seiko's 1973 lineup. With its 18mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-5301c49bffee]

Also known as: Panda, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1973

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