Originally Posted by QuiltE

It's hard for us to tell looking at the picture.
Look at the types of fabric ... and the ages of them.
Consider the construction methods, and the sewing/stitches used.
How white are the whites? Is there any yellowing?

There really isn't enough there for us to see IMHO to help you with the dating of it.
It could be as old as "made last week" or ..... ancient!

Regardless, it's a lovely piece ... and I hope you have fun finishing it up.