Seiko Cal. 3815 - 390

The Seiko 3815-390 represents an important milestone in Seiko's 1970 lineup. Powered by the 3815 caliber with 34j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-3b0e3b673310]

Also known as: Helmet, Sea Horse

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1970

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