Marking a question like this as a duplicate seems like a bad way to welcome a new user to our site. Do we expect this new user to have checked every part-identification question already asked to see if they notice a picture that is similar to theirs? Most of these questions don't have enough words describing the part to be useful in a keyword search. So as of today you'd need to review 404 existing questions to make sure you are not creating a duplicate. Assuming that our new user is a LEGO superfan and willing to consider doing that, this superfan would also know that there are 60093 possible parts, so the chance of finding your question are 0.67%. Wouldn't most people just post their question and hope they're in the 99.33%? And this problem gets harder every day that somebody adds a new one.
So should we have a site-specific policy for these questions?
I looked for dupes of this question, but I didn't find any on this meta.