Seiko Cal. 6357 - 998

This Spring Drive model from 1979 features a 36mm Hardlex-Coated Steel case. Powered by the 6357 caliber with 30j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-158a2f3a41e1]

Also known as: UFO, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1979

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