WOW that is one darling idea !!! I wish I had some old ones to make that with !

Silk will last forever. I am using some they sewed parachutes with in WW1. The rayon also will last. The little ones are pre-wound bobbins. I use these in my FW and my Janome. They are wonderful as they use to make them with very fine but stronger thread. The varigated threads are not very old so you should not have a problem with those. WOW! Just like Christmas only better for a quilter. To use the bobbins in a FW you pull off the front and back gently and put into the bobbin holder. I love them. Saves me so much time.

It's all in French without any English on the package but from my very limited knowledge and a google translator, all I could make out was that it's cotton.

I did a break test on the variegated and they broke very easily.

I was told to do the breaking test. Pull on the thread a little and if the thread breaks then it can't be used, but if not its fine. The paper bobbins are just that. You tear the top part of the paper (as I have been told) and put it in your bobbin case and sew away. Hope this helps.

Before you discard any you should put them in the freezer for awhile and the moisture will strengthen them. When you take them out try the pull test again.

Before you discard any you should put them in the freezer for awhile and the moisture will strengthen them. When you take them out try the pull test again.

I would go ahead and use it. The prewound bobbins are standard bobbin size, and will work in most modern machines. I have some spools of thread from the 1970's that are still just fine. I use them all the time.

Use the thread for making yo-yos and English Paper Piecing.

Whatever you do, don't get rid of the wooden spools. There are pleny on the board who would love to have them, myself included, if you do not want them. Let us know.

Wow!! The first picture is awesome! I'll bet that has some
value!