You've probably seen the graphical parts inventory that I maintain here, and you've also probably realized that it's missing far more elements than it contains.
Guilty as charged.
In the interest of compiling as complete a listing as possible, with or without corresponding images, I'm soon going to be posting a list of "unclaimed" part numbers. That is, part numbers that are absent from a known sequence of parts already accounted for. I would be grateful any help in identify these what these parts are, if possible, and ideally I would like to determine at least one set in which the part appears. This way we can perhaps move toward an ever more comprehensive inventory.
In the (very?) long term I would also like to compile a cross-reference showing which part comes in which set(s). This will be a ton of work, but it would be a labor of love and would (I hope) be beneficial to anyone trying to track down this or that piece that they found in their collection or acquired via ebay, Goodwill, craigslist, etc.