IMHO that is definitely a double wedding ring quilt. I have never seen one done with the colors in the wedges and such, but the rings are made out of material very much like that in an old DWW quilt I have that either my GM or GGM made. That would make it rather old. I would say 60+ years, but I am by no means an expert. But, I will bet someone on the board is, so you should get an answer. By the way, great job on the rescue!
Hmmmm...now that I look at it again, I don't know if it is as old as I thought at first. Some of the fabric looks that old, but some of it looks more like the 1960's-70's, so perhaps someone had a stash of old material and added what they had from the current time to it.