Seiko Cal. 3813 - 923

The 3813-923 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3813 caliber with 17j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-57d4328c0453]

Also known as: Monster, Shogun

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

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