Just curious if this old flip front might be anything someone would recognize. I couldn't find anything about the Cesco-Chicago brand but I have seen old saftey glasses and torch goggles with that name before. I'm not sure if the helmet would be from the same manufacturer the only marking I found was 51-2. I don't think the lens is anything special, maybe a #9.
Reply:Brand is CESCO. Chicago is a branch. I believe it's a worldwide company. Not sure how active they are these days.Can't tell you much else.