Seiko Cal. 5679 - 644

This Spring Drive model from 1970 features a 46mm PVD Black case. Powered by the 5679 caliber with 30j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-63dbb8b58bc0]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1970

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