The parable....
In 1979 one Erwin Tragatsch published the Illustrated Encyclopedia of Motorcycles, claiming to have listed EVERY brand of motorcycle ever built - even those batches of half a dozen built in the early 1900s by bicycle shops clipping aftermarket motors into their own pushbike frames...
Believe me, it is a mighty and weighty tome!

And even today a considerable monetary investment.
Here in the UK
FOR THE NEXT 15 YEARS the letters page of one of the monthly Classic Bike mags was filled with brands Tragatsch had missed out!
These many and various new finds became colloquially known as
"NAITs" - "Not Appearing In Tragatsch"....
Stand by, Tom!
"Well, my days of not taking you seriously are certainly coming to a middle." - Malcolm Reynolds