Seiko Cal. 3813 - 161

Released in 1974, the Cal. 3813 with design code 161 was part of Seiko's domestic market collection. Powered by the 3813 caliber with 34j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-4fa7677bdb75]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

34j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1974

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