This is an original Close Encounters of the Third Kind (1977) Alien mask. This stunning and rare movie property was called, Priceless , by David A. (Special effects technician on Close Encounters of the Third Kind) when I presented him (via internet) with this very item, saying, It looks like you've got an original there. As seen in the photos, there is significant drying, hardening, dry-rotting, and missing small chunks along the bottom, which is typical for a latex mask made for a movie shoot over 40 years ago.
The intelligent, dedicated collector should be able to find a way to preserve or even restore this treasured (and priceless) piece of movie history for his or her own private display. Later offered some advice on how to preserve it. Best is to keep it stuffed with clean paper, in an air tight plastic bag and in a box away from light and heat. Also, you might try to inject some Nitrogen gas into the bag to push out any air.
Nitrogen will preserve some chemicals kept in containers for longer periods of time. Also, a wild idea, encase it in liquid plastic like those scorpion paperweights. Good luck and I hope it all works out for you. David A (full name withheld in public, but available upon request). The monkey is not a screen used prop, but is vintage and being included to add to your Close Encounters Display.
I also have available a screen accurate Pinocchio music box that plays, "When you Wish upon a Star, " and one very similar to mine was featured in the original theatrical release. This is another terrific item to feature in a display along with this mask. The only other one of these masks Ive seen was owned by Forrest J Ackerman. The item "Close Encounters of the Third Kind Screen Used alien mask prop" is in sale since Wednesday, May 30, 2018.
This item is in the category "Entertainment Memorabilia\Movie Memorabilia\Props\Originals". The seller is "jerrya429" and is located in Staten Island, New York. This item can be shipped worldwide.