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Blessing
http://jimlaabs.com/bandinstruments/blessing2/brass1.html
Specifications, photos and descriptions. (Models M-400 and M-100)
Kanstul
http://www.kanstul.com/
Manufacturers marching brass instruments and mouthpieces.
Yamaha
http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail/0,6373,CNTID%253D2262%2526CTID%2
Pictures and specifications. (Model YMP-203M)