Seiko Cal. 3813 - 557

This Spring Drive model from 1969 features a 39mm PVD Black case. Powered by the 3813 caliber with 26j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-5ee90b6b84cd]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1969

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