Seiko Cal. 5677 - 256

The 5677-256 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5677 caliber with 26j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-cfd9304b837f]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1977

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