face shield fore bikes ore metal work ?

[glaser 31]

I have some NOS boxes,that came out of a motorcycle shop.
I was told they were used fore motorcycle , they are called Face Shield model F-100 window American Optical company.any know these..?

[23JDCA 808]

http://cgi.ebay.com/ws/eBayISAPI.dll...m=230505289237
The company appears to make face shields for industry, like chemical workers and fire fighters. ...bill