large antique mission oak 3 original glass door bookcase

It is a very old 3 vertical side by side original blown glass door dark quarter sawn or tiger oak bookcase with adjustable dark oak shelves. The interior backing is just temporary set in place thin plywood covered in wallpaper. the actual interior back in the same dark oak. It is so large and heavy, I'm afraid to try to move it until my husband and 3 of his friends come over, or I'll scratch my floor. I don't remember if there are any makers marks or labels on the back. I would like to know if you can tell me the maker, the age and approximate value. I'm not sure at this point if I'd like to sell it.