The best source I have ever seen on Wurtemburger uniforms
(perhaps the most confusing country of the era outside Sweden) is W. J.
Rawkins' The Armies of Baden and Wurttemburg, published in 1984. 
It is extremely
detailed in its presentation of uniform and organizational data. 

Here is a
small excerpt from the section on Wurtemburger Jaeger-zu-Pferd: 
 
"MUSICIANS:  The trumpeters wore  the same pattern helmet as the other
ranks with reverse colour raupe for the 3d Regiment, green over yellow, and
raupe of rose pink over dark green  for the 4th Regiment, and after the
introduction of the shako, plumes of dark green tipped with the facing
colour....." 
 
Honestly, this little book gets down to the "steel scabbard, black sabre
strap with scarlet knot and tassels" level. 
 
Bill Gray ltcgray@usa.pipeline.com