Hi Bill.
The Silverbird has been out for years so I hope they have taken the insides out and replaced them with all new modern technology.
I can remember going to Anthony Lomas's house to play this model as he used to demonstrate for Bohm. It was a very good instrument for its time, but I am going back many years now. Maybe late 90's early 2000? I was hoping the new models I heard about last year would have a new name but unfortunately not. I am looking forward to hearing these though, maybe Wersi have a bit of competition again?