Here is the actual copy from Bryston of the warranty rule which matters::
"" As of 2006-02-22 Bryston will only warranty Bryston products purchased through authorized Bryston dealers. Bryston products with a date code of 0608 or higher (date code format is “yyww”, where “yy” is the two least significant digits of the year and “ww” is the week of the year) must be accompanied by a copy of the bill-of-sale from a Bryston authorized dealer to qualify for warranty service. The warranty is transferable from the original owner to a subsequent owner as long as a copy of the bill-of-sale from the original authorized Bryston dealer accompanies the re-sale. The copy of the bill of sale to any subsequent owner need ONLY include the Name of the Bryston Authorized Dealer and the Model and Serial number of the Bryston product. The warranty will only be honoured in the country of the original purchase unless otherwise pre-authorized by Bryston ""
So.. 'made after 2006' means NO you have NO WARRANTY.
I would guess....
with the Cubed out, the Squared is pretty low priced.. so any SST is not worth $2 grand without any warranty papers.
I am sure you can find a Squared with papers for $2,500 and it is worth the $600 more over a paperless SST