Here are links to  some useful and informative websites:

Conn-Selmer - manufacturer and distributor of many well-known brands, including Armstrong, Bach, Conn, Holton, King, Leblanc, Ludwig, Musser, Selmer, and more

Eastman Winds - maker of Eastman brasswinds and Eastman and Haynes flutes

Jupiter - maker of a full line of wind and percussion instruments

Korg - Tuners and Metronomes

Marching.com -  is a one-stop source of high school marching band events, scores, links and resources. Find details of major parade and field competitions, links to marching bands on the net, and a directory of services and supplies for your marching band, color guard or drum line.

Pearl Drums - home of Pearl drums and Adams concert percussion

Pearl Flutes - home of the Pearl brand flutes and piccolos

Schilke - manufacturer of professional trumpets and trombones

SCSBOA - The Southern California School Band and Orchestra Association oversees many parades, field shows, concert band and orchestra festivals, solo and ensemble festivals, and honor groups.

Serial Number References - Lars Kirmser's Music Trader has compiled one of the best reference lists for musical instrument serial numbers that we've ever seen!

Yamaha - did you know that the world-famous Yamaha corporation started out as a maker of musical instruments?