Seiko Cal. 3815 - 720

The Seiko 3815-720 represents an important milestone in Seiko's 1987 lineup. Powered by the 3815 caliber with 27j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-f154a35d54d7]

Also known as: Sea Horse, Arnie

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1987

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