External member for a watch

Details External member for a watch External member for a watch

1986-02-28

1987-02-03

Miska, Vit W.

Horology: time measuring systems or devices

Cases

Of particular material

75228, 420534, 428620, G04B 3700, B22F 100

Patent

active

046406255

ABSTRACT:
A body of an external member is made of an aluminum alloy containing 0.5-2.5% of magnesium by weight, less than 0.01% of silicon by weight, and less than 0.01% of iron by weight. An anodic oxide film is formed on the body.

REFERENCES:
patent: Re29739 (1978-08-01), Kessler
patent: 4017337 (1977-04-01), Winter et al.
patent: 4297136 (1981-10-01), Pickens et al.

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