The Cesar mask company of France was founded in 1842. I sure wish I could tell you more about them, but that's pretty much all that's on their "About" site.
Cesar is known for their vinyl masks (as opposed to latex). That may be why this one has survived in such good condition since 1971.
Cesar masks are widely known for their presidential masks. They claim the sales of masks of the candidates reflect who will win an election and did so for both Bill Clinton elections, Bush Jr. vs Kerry and Bush Jr. vs Gore.
Additionally, their masks have been used in multiple movies throughout the years including Point Blank and probably best-known to horror fans from the 1986 slasher film "Slaughter High" in which the killer dons a Cesar "Old Man" mask.