Valves on Brass instruments were first publically reported in 1815. Valved trombones were first introduced in the late 1830s. The valve trombone had definite advantages (taking up less room in a seated orchestra was one of them!). Verdi, for example, composed passages that would have been impossible on a normal slide trombone.

The Vienna valve was one of the earliest  valve systems. It was invented in Leipzig in 1821 by Sattler and predated both the Pertinet valve (Paris) and the rotary valve still used oday in Germany and in Europe (and in all French horns). Vienna Valves (or Double Valves) have two short parallel pistons connected at the bottom by a bar that is moved by a long rod or linkage connected to the spring loaded finger plate.  The Vienna system was in common use in Germany on all kinds of instruments- including trumpets up to 1850.    French horns with vienna valves can still be seen in use  in European orchestras. This trombone above comes in a fitted wooden "coffin" case and has a "shotgun" style bell with minimal flare.