Seiko Cal. 3813 - 103

The Seiko 3813-103 represents an important milestone in Seiko's 1969 lineup. Powered by the 3813 caliber with 34j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-10d39a0a0c2e]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1969

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