Seiko Cal. 6647 - 475

This Spring Drive model from 1986 features a 41mm Hardlex-Coated Steel case. Powered by the 6647 caliber with 18j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-665653406e44]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1986

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