68 pc Nobility Plate Royal Rose in wooden box

I recently cleaned out a storage area for a friend and found this wooden box. I opened it and found what looked like silver spoons, forks, and knives. I asked about it and she said I could have it. I did a search and found out it is the Royal Rose collection from Nobility Plate. The box is original with what feels like velvet lining, and the top and the bottom of the box are here, though they are not connected any longer. There are 68 pcs  altogether but I think there are missing pcs because there are twelve spoons and eleven forks and so on. I was wondering how much this is worth? The silverware is in good shape, though tarnished.