Seiko Cal. 3813 - 930

This Hand-Winding model from 1975 features a 44mm Two-Tone case. Powered by the 3813 caliber with 31j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-ee01142e14db]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1975

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