Conn and Dupont "Four in One" Cornet
Charles Gerard Conn was a cornet player that had gone into the
business of making rubber rim mouthpieces that he had
patented in
1875.  In 1876, he met up with an instrument maker Eugene Dupont
and together they developed and
patented the "Four in One" model
cornet.  This example was made after the patent was granted in
January of 1878.  This cornet was designed to play in Eb, C, Bb and
A which pretty much covered all the pitches in which cornets were
commonly played in brass bands, church orchestras, social orchestras
and home parlors.  All of this was carried in a normal size cornet
case.  From the very start, Conn had the flair of a showman and his
instruments were intended to be impressive and he succeeded in
making them of a very high quality as well.  His instruments were
elaborately engraved and the silver plating was thick and durable.  
Even the cases were made of varnished walnut rather than the much
more common painted pine box.  He did make some less expensive
instruments in the early years, but judging by the fact that we find
very few of them in collections today, he was more successful in
selling the better grade.  The partnership of Conn and Dupont broke
up in 1879 but by that time the brand was established, the work
force was trained and Conn went on to become the largest band
instrument manufacturer in the world.  For more historical facts see
Margaret Downie Banks' extremely well researched history of C.G.
Conn's career.

This is an impressively well preserved example of this model that is
also an excellent playing cornet.  The silver plating is mostly intact
and it hadn't been damaged badly in it's past.  The serial number,
527, dates it fairly early in production of this model and about half
way through the life of the Conn and Dupont partnership.  It retains
it's original walnut case, Eb shank, crooks for C and Bb, bit for the
Bb crook and A shank to extend the Bb crook to that pitch.  The
mouthpiece pictured is a much later example by Conn.  Of course it
plays in the high pitch used in most US bands at the time.  The
length of this cornet is 12 5/8", the bell rim diameter is 4 13/16" and
the bore measures .454".  Another very similar cornet is shown in
my restoration pages.

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