I also want to include only machines that had a full production run e.g. machines that are rare now as only relatively few remaining, not primarily that were always few in number. If the thread takes off maybe the site owner could do a poll at the end to decide a top 3 or similar?
Condition irrelevant. For example if you own a Jennings Governor MKII that's likely to be rarer in this poll than a Jennings Governor although a Mark II is probably likely to receive a lower auction bid, but rarer? There may be some surprises - who knows? I have been downsizing my bandits and have sold my rarer machines but I'll start off with these that will not be in the top 3 but don't get advertised for sale too often:
Mills Bellomatic 4 Reeler 25c
Jennings Governor Pearly King & Queen on 6D (if it passes production run parameter)
Chip in with suggestions, if not made clear etc., or parameters need revision to improve. If a collector doesn't want to make public, then fair enough, maybe they could pm me? Or the Site owner, later to include in a poll at the end without matching machine to owner and possibly its location for security purposes. Hope I've covered most things. I'm sure there are many rarer machines than this, maybe European manufactured?