I have a trumpet on the Bell it had's ADAM U.S.A it has a Radial valve casing.. like the Selmers have. also the pinky ring is like my selmer 1/2 C with a grove down the middle of the C... But the problem is my Coueson has the same style pinky ring.. A friend of mine stated in his 27 yrs of buying and selling instruments he has never seen a Radial on any thing but a Selmer. As both companys were in France. they might have used the others ideas, I dont know, The question is who made it???? tom.