I had a pocket watch my dad passed down to me and I passed down to my son. It has been in our family for a couple of generations prior to my dad. I researched it a little while I had it, and it is not worth very much. Mostly, from what I read, the advice was to keep it in the family because it wasn't worth selling. I don't guess that would qualify it as an heirloom, but I'm still glad we have it.