Seiko Cal. 3813 - 702

The 3813-702 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3813 caliber with 28j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-e86d7c565abf]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1971

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