What type of binding was used on the quilt?

Straight or bias cut?

Single fold or double fold?

Just asking because I've been wondering how the various binding survive use and time.

It's a nice quilt and will look very nice on display. Repairing a quilt can devalue an antique but unless you plan to bring it to the Antique Road Show or insure it, I wouldn't worry about it. I would hand sew a new cotton white binding over the existing frayed binding. That way you will prevent any further damage (vaccuum catching a raw edge). With antique repairs, I think they hand sew bridal tulle? over frayed spots for perservation.

The binding looks like it is straight grain, single fold. Sewn from the back turned and top stitched on front by machine.
Looks like tiny stitches, about 15 per inch, too tiny for me to count.

Thank you.

Your Welcome, and THANK YOU everyone for your responses, I appreciate all the replies.

I would apply a new binding over the old...find some vintage fabric that is similar to the original. Bindings take the most wear of any other part of a quilt..which is why I use a double folded binding on my quilts