I think it adds an invaluable amount of interest and credibilty to any thread on any forum when the people who matter take the time and trouble to get involved
On topic: It doesn't matter whether FTW's bike above is #1, #100 or even #1000; He built it, he rode it, and he was the one who dug it out of his friends storage to auction it off. He was the one who photographed his own bike and posted the pix to illustrate his thread.
It amazes me that others can see fit to actually question the man himself regarding the provenance of his own bike!
Prototype/production bike? Who cares? The bike is one a very few whichever way you look at; FTW built it for himself and rode it, kept it, sold it. That makes it a pretty 'limited edition' bike...
I for one am very envious of the new owner, and top marks for your spirit of generosity