Teodor you know you and I are very much on the same page regarding the Tirri 'references', and who can forget the BSY drama!
However as with most of these kinds of books, subsequent research and findings can often either further refute or sometimes support entries . In the case of these sabres I personally have not held to Tirri's classification, but as with many cases there is a wide scope of qualification and things can often be in gray areas.
Overall the larger balance of his attributions are reliable, and very much so considering those who consulted in preparation of the book, however it seems the major problem is the lack of cited references and sources.
I definitely agree, that we as students of arms history should not propogate false information, but continue research to properly balance information at hand. If these are indeed with the origins in Morocco then we need to properly acknowledge that with new findings, but frankly at this point the jury is still out.
Conversely, with the Laz Bicagi case, a classic example of revision, reminding us to recheck data used from many of the references we consult. I once read "...the thing I like most about history, is how its always changing!".
All the best,
JIm