Seiko Cal. 3815 - 735

This Spring Drive model from 1966 features a 45mm PVD Black case. Powered by the 3815 caliber with 20j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-ba739b7bf7ec]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1966

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