I found these vintage embroidery thread books a while ago.
I don't think they have the original threads inside. But they've definately been in there a while! (all flattened down).
There is a round piece of very thick felt in one of the front covers, to keep needles in (the sides). The only embroidery I really do at the moment is for the faces of some soft toys. I haven't used any of these threads yet!
For more wonderful finds, pop over to Sophie's place!