Since Harley Davidson is a company name,,and its a brand which is registered would be different rule !! The problem with the chair is only construction methods can be verified and no way to tell if the same methods were used on all !! May or may not have been !! Many workers in that factory so could have been varied by each worker !! Same holds true with many of the period pieces by Duncan Phyfe and others !! "Attributed to" is easy to say,,, hard to prove !!