This is the kind of information I need - thank you for it! I never even thought about going to the websites. Duh! That should have been my first move. lol
I just spent 3 hours going through all of them just to separate them by brand.
2 spools were cotton - they were the old ones that broke.
I did find 1 elastic thread on a wooden spool and very easy to break.
1 fusible spool in shrink wrapped plastic...no idea how old it is or if fusible thread even goes bad.
2 were Isacord cones - I've not used Isacord before but they're new and in good shape.
A few were Coats & Clark All Purpose cotton/poly, most of the AP's were C&C 100% poly - I grew up using this AP thread but have read it's not as good as it used to be.
60% was Mettlers, the rest was Gutermanns.
There were also 2 quite odd looking, fully plastic, machine feet and some itty-bitty little needles with a name Geschuetztes Muster I'm going to have to research.