Seiko Cal. 3815 - 440

The Seiko 3815-440 represents an important milestone in Seiko's 1969 lineup. Powered by the 3815 caliber with 28j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-188d76fc1633]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1969

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