antique shaker rocking chair.

I got this rocking chair about 10 years ago out of an attic in an old house in brokline mass. I took it home dusted it off and put it in a coener and kind of grone atached to it and now i wold like to find out moor about its age and origan.I know its shaker style is it orignal or a reperduction.Anny information i can gather on this pice would be gratefuly appcated thank you.