Seiko Cal. 3813 - 513

Seiko 3813-513

The Seiko 3813-513 represents an important milestone in Seiko's 1983 lineup. Powered by the 3813 caliber with 20j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-ace8b2ccb34c]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
13.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Green
Jewels
20j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1983

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