Because it represents a unique piece of history
But the question is (and you know I would never normally ask!) is... how much would you pay for it???
Always important to bear in mind that history does not equate to value. It is the additional actual and even anecdotal information that expands the provenance and adds value.
As an unidentified piece that you might pick up in a market... perhaps £5. But by identifying it, you may have already increased the value from unknown to a provenance! Now that you have identified it, the question is are there any more? If it is the only one and there is more than one Chance collector after it, its potential value, say at auction could be considerable, even though not much is really known about it. Even the suggestion from Frank that if he were a Chance collector, he would set his limit at three figures, has arguably pushed the value up!!

It is probably worth over £100 now!
On the other hand, by identifying it, you may have simply notified someone who has hundreds of similar ones, that they were Chance trials. In which case the value could plummet again. Except that if there were lots of different ones on the market, they could become collectable..like handkerchief vases...and the value could start rising again.

However, if your subsequent research established who the maker was, and if that maker turned out to be someone important, that could send the value much higher. For example, if you were able to show that Michael Harris made it there as a trial, and that it was the only one, it would make it considerably more valuable. Because this could make it attractive to MH collectors as well as Chance collectors.
For obvious reasons most people don't like to guess values, as you know.....because there is always a risk that they will turn out to be wrong! So I won't be offended if I turn out to be way off the mark!

Just another case of SYNOS
