Hello all! My girlfriend who happens to be an E-7 in the US Navy has an antique flag, from some research of my own i believe it to be a 1876 Centennial flag flown by naval Ensign ship during that time frame, it is a 13 star flag 46" x 29". There is a name sewn on the back of the flag near one of the metal grommets "Margaret Donegan". If any of you can, i would like your professional insight on the history of this type of flag. I am trying to convince her to keep it as a family heirloom but she kinda wants to sell it, any idea of value of this piece. Of course i shall attach pictures. Any insight is appreciated, thank you all.