Now offering repairs at my repair site, metzlerbrassrepair.com.
"Like" Metzler Brass on Facebook.
The Conn Loyalist site is a great resource to research your Conn instrument.
Jeff Stockhams Excelsior Cornet Band is an authentic Civil War Brass Band.
Check out Lew Greens bands at greensmusic.com.
Richard I. Schwartz is the author of The Cornet Compendium, a History and Development of the Nineteenth Century Cornet.
Look here for manufacturers serial number lists.
Look up patents by keyword or number at Google Patent Search.
To research your vintage instrument, and for other interesting information, Horn-u-copia is an excellent resource.