Seiko Cal. 3813 - 627

The 3813-627 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3813 caliber with 17j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-3043edd0fc1f]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1977

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