Technical Windshield Wiper Arms...Adjustable.!

I have a set of Adjustable Wiper Arms which a Freind of mine said are worth
quite a bit of Money.!
Does anybody know anything about these wiper arms
they open to 10" & close to 7"
made in the USA a lot of Pattern No. but No Manufactuer Name
They are New old stock
TIA
just my 3.5 cents

 

Trico & Anco both sold them. Usually found on '30s to '50s cars to replace lost or broken arms and blades. They're not worth as much as the part you're supposed to have.

 

I've got them on my 48, You can even take them apart and cut them down to get shorter yet for chopped windshields.