Seiko Cal. 3820 - 313

This Hand-Winding model from 1971 features a 39mm Stainless Steel case. Powered by the 3820 caliber with 26j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-70ff1bd1c80a]

Also known as: Helmet, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1971

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