[Trombone-l] Duo Gravis -- what model???

[Eric & Candice Swanson]

Earl Needham wrote:

>
>         As it seems to me, the "Duo Gravis" name has been used with 
>several different models through the years -- at least 6B, 7B, and 
>8B, although mine has no such model number, strictly the name.  
>


The Dou Gravis refers to the 6B.  The 7B and 8B were different animals 
with in-line valves that came along later.

Eric Swanson