Antique Mirror

I JUST GOT THIS MIRROR AT AN ESTATE SALE AND EVEN THE 72 YEAR OLD DAUGHTER OF THE ESTATE SAID SHE REMEMBERS THE MIRROR SITTING IN THE SAME PLACE EVEN WHEN SHE WAS A TINY CHILD IT WAS HER GRANDMOTHERS ORIGINALLY,WONDERING WHAT ITS WORTH, IT IS 20" HIGH FROM FEET TO TOP OF FRAME AND 19" WIDE BASE, IT IT PIVOTS UP AND DOWN AND IS IN STUNNING CONDITION FOR SOMETHING THIS OLD AND ODD.IT HAS A LABEL WITH A PAPER LABEL INSIDE AND I BELIEVE NOT SURE.THINK YOU IT SAYS 1875.THANK YOU, CANEMAKER