Seiko Cal. 3813 - 770

This Spring Drive model from 1982 features a 45mm Titanium case. Powered by the 3813 caliber with 19j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-850d065dfc21]

Also known as: Crown, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1982

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