Seiko Cal. 3815 - 509

The Seiko 3815-509 represents an important milestone in Seiko's 1981 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-6b2ca5163884]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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