This piece is a little newer of vintage than I usually deal in, but I just couldn't resist this very realistic life size mama hen!
Yes, it's plastic or some type of plastic composition. And yes, probably made in China, about 20 years old.
She's got a little wear and scuffing to her black painted finish, which would be easy to touch up if it bothers you. She's light in weight, so easy to display. Measures about 9 1/2" x 10" overall.