Many props built for one episode of TOS were re-purposed for other episodes. Can we build a comprehensive list of every reuse of a given prop? Let's start off with the Neural Neutralizer's control panel.
Once we've exhausted the reuse of one prop (to the best of our combined knowledge at the time, but we can post addendums if and when they are discovered) we can move on to the first new prop to be posted. Anyone can post a prop, but let's stick to one at a time and respect the first new one posted.

Once we've exhausted the reuse of one prop (to the best of our combined knowledge at the time, but we can post addendums if and when they are discovered) we can move on to the first new prop to be posted. Anyone can post a prop, but let's stick to one at a time and respect the first new one posted.