It is great to have people with your knowledge as members of the forum. Invaluable and with a common sense opinion. Very unusual in this day and age!
The Corton Deluxe saxes I've owned and played were based on Yanagisawa! To be honest I don't know which model but sopranos and baritones are often stamped with "6" and altos and tenors with "5". The -75 Corton Deluxe was a modern construction?Corton saxophones were GENERALLY made by Amati but it is possible the Yanagisawa made the Corton “ de luxe”.
Long time No see! The sax is still in use and I love it. Do you have any idea how I can see what kind of yani-model this saxophone is? A4? A5? A6?then there were successive generations of Yanagisawa made Corton de Luxe.
The A & T 5, certainly desirable, are different from the A & T 6 and the 6 are definitely a very desirable saxophones .