Information request on 28 gauge Parker
 

Hello, good afternoon. First time posting. I have a Parker Brothers 28 gauge that was left to me from my stepfather. The serial number is #213858. I see that it was manufactured in 1925. I was told, when it was given to me that there were a pair that belonged to a Doctor in Atlanta. The Doctor gave one to my stepfather's father. I requested a letter from PGCA and was informed that there were several on the same order # in the stock book but no way of tracking after that. Can anyone help with info on how to perhaps figure out who has other gun? If there is another one in pairing?
I am interested to know information on the gun? I would like to know its value. Can someone help? Thank you!