Antique Chairs and Couch - 100 years old

I've been told these have been in the family for 80-100 years old, as they belonged to my great grandfather. 

My understanding was these were reupholstered back in the 60's or 70's.

I haven't found any markings on them, and would like to know exactly who and when they were made as well as the value of them.

I've been asked for years where we found them, but again my family has had them for as long as they know, but no one knows exactly how old they are.