The horns in this collection are listed below grouped by nationality having similar characteristics, and arranged more or less chronologically. Determining the date of manufacture is often problematical in the absence of a serial number, known provenance, or worse yet, a maker's name. In many cases, the dates given are only a best guess and any corrections or additional information is always welcomed.
The general background comments below are offered as only a synopsis of the sometimes complex development of the instrument over three centuries. Detailed information on specific instruments is provided on the linked pages with more pages to be added continually to eventually complete the collection. For a more complete history of the horn please consult the excellent works listed in the bibliography at the bottom of the page.

Hunting Horns

Maker	Description	Location	Date	Ref.	Updated
"A S"	Parforce Horn in C basso	Germany?	ca 1800?	016	7/19/2011
Medieval Arms	Roman Cornu (reproduction)	Germany	2008	062
anonymous	Petite Cor de Chasse, in D alto	France	ca. 1860?	070
Arsène Zoë Lecomte	Trompe Dauphine in D	Paris, France	ca. 1880	063
Courcier & Prétet	Trompe de Chasse in D	Besançon, France	ca. 1890?	017	4/23/2011
anonymous	Trompe de Chasse in D, modèle Maricourt	France or Belgium	ca. 1890?	068
Elless	Trompe de Chasse in D	France	ca. 1900	018	7/19/2011
Pélisson, Guinot & Blanchon	Trompe de Chasse in D	Lyon-Paris, France	ca. 1900	019	4/23/2011
Erste Wiener Productiv Genossenschaft der MusikInstrumentenmacher	Waldhorn in Eb	Vienna, Austria	ca. 1900	020	7/19/2011
anonymous	Parforce Horn	Germany?	ca. 1900	061
van Calwelaert	Cor de Chasse in C	Brussels, Belgium	ca. 1903	069

France, England, and Belgium

The horns of France, England, Belgium are grouped together here due to their close similarities. They are of relatively small bore, small bell, and similar taper based on the profile of the original French natural horns of Raoux, et. al. Credit for the invention of the first practical valved horn has generally been given to Heinrich Stölzel (or Stoelzel) of Breslau, Upper Silesia in 1814. (This invention was challenged by Friedrich Blühmel who claimed to have invented a valve as early as 1811/12. Stözel and Blühmel were issued a joint patent in 1818.)
For most of the nineteenth century there was strong opposition in France to the use of valves at all. The Stözel valve enjoyed some popularity there on horns and cornets prior to about 1850, however the valveless cor d'orchestre continued to be preferred. The continuing strong predilection for the natural horn sound with its stopped and half stopped coloration led to the development first of the "omnitonic" horns and later of the sauterelle removeable valve section. The omnitonic concept was to semi-automate the process changing the length of the air column using various ingenius combinations of slides or rotary "taps" to eliminate the box of terminal crooks that accompanied the cor d'orchestre. One such horn by P.-L. Gautrot is included in this collection.
After about 1850 horns made in France, England, and Belgium almost universally employed the piston valve designed by François Périnet in 1839. The other uniquely French innovation was the ascending third valve system developed around 1847 by Jules Halary. In this system the whole-tone third valve slide is part of he open horn airway and is subtracted when the valve is pressed. For this reason the horn is played with a G terminal crook which stands the horn in F with the added length of the third valve. Most of the F-horn fingerings are unchanged with the exception of the total loss of some notes in the lower register. The advantage is the some of unstable notes of the F horn are eliminated due to the shift in the harmonic series afforded by the ascending valve. This system was common (although not universal) into the double horn era of the twentieth century. Some horns were equipped with a sauterelle in which the standard valve section can be slipped out of the horn corpus and replaced by a section of straight tubing thus converting the horn back to its "natural" mode. This is the form that was advocated by François Brémond at the turn of the twentieth century and probably the horn for which Dukas intended his Villanelle as the morceau du concours for the Paris Conservatory in 1906. In the twentieth century, double horns became prominent, still using the Périnet piston for the three finger valves (often with the ascending third valve) but usually incorporating a rotary thumb valve for the F/Bb conversion.

Maker	Description	Location	Date	Ref.	Updated
Lowell Greer, after Hofmaster	Baroque horn with crooks, after Hofmaster, London, ca. 1750	Toledo, Ohio, U.S.A.	2003	032
C.T.D.	Petite Cor d'Orchestre	Paris, France	1807	031	7/19/2011
Halary	Cor d'Orchestre	Paris, France	ca. 1830	034	1/23/2012
Tabard	Cor d'Orchestre	Lyon, France	ca.1830	006	7/19/2011
Guichard?	2 Stoelzel valves with crooks	Paris?, France	ca. 1840	008	7/19/2011
Gautrot Breveté	Omnitonic horn with 3 rotary taps	Paris, France	ca. 1850	054	7/19/2011
Antoine Courtois	3 Périnet valves with crooks	Paris, France	ca. 1870	039
F. van Cauwelaert	Cor à Pistons with 3 Périnet Valves	Brussels, Belgium	ca.1871	003	7/24/2007
F. van Cauwelaert	Cor à Pistons with 3 Périnet Valves (silver plated)	Brussels, Belgium	ca.1871	048
C. Mahillon	Model 499 Cor à Pistons with 3 Périnet Valves	Brussels, Belgium	ca. 1875	055	12/20/2011
C. Mahillon	Model 499 Cor à Pistons with 3 Périnet Valves (silver plated)	Brussels, Belgium	ca. 1905	059
Steemans	Single F	Brussels, Belgium		051
Raoux-Millereau	single F ascending, silver plated	Paris, France	ca. 1880	047
Gautrot Breveté	Cor d'Harmonie with 3 Périnet Valves	Paris? France	ca.1890	005	3/6/2002
Thibouville-Lamy	3 Périnet valves with crook	Paris, France	ca. 1890	050
C. Mahillon Model 29 Single Horn	Single F, 3 rotary valves	Brussels, Belgium	ca. 1897	058	7/19/2011
Raoux-Millereau	Cor naturel avec sauterelle, 3 Périnet valves (right handed)	Paris, France	ca. 1900	022	7/19/2011
Boosey & Co.	"Class A - Light Valve", 3 Périnet valves, sauterelle	London, England	1900	046	7/19/2011
C. Mahillon	3 rotary valves,	Brussels, Belgium	ca. 1900	071
Couesnon	Compensating ascending double 3 Périnet and 1 rotary valves	Paris, France	ca. 1910?	045
Besson	"Prototype" - 4 Périnet valves in F and Bb (non-compensating!)	London, England	ca. 1920	025	7/19/2011
Boosey & Co.	"Sotone" - 3 Périnet valves with crook in F	London, England	1921	024	7/19/2011
Henri Selmer	Compensating, ascending double 3 Périnet and 1 rotary valve in F and Bb (silver plated)	Paris, France	1933	041
Couesnon	Compensating, ascending double 3 Périnet and 1 rotary valve in F and Bb	Paris, France	ca. 1945	053
Henri Selmer	Compensating, ascending double 3 Périnet and 1 rotary valve in F and Bb (brass)	Paris, France	ca. 1950	049

Germany and Bohemia

The horns of Germany and neighboring Bohemia are pretty much the opposite of the French models described above. In general they are of much larger bore, bell profile and diameter, and very early incorporated the rotary valve rotary valve, designed and first produced (but not patented) by Friedrich Blühmel in 1828.

Maker	Description	Location	Date	Ref.	Updated
anonymous	"German model" orchestral horn (Orchesterhorn)	Germany?	ca. 1800	035	7/19/2011
anonymous	3 Berliner Pumpen Valves	Berlin?, Germany	ca.1840	007	4/23/2011
Josef Wolf	3 rotary valves (triangular pattern) in F with crooks	Prague, Bohemia	ca. 1875	029
Josef Müller	3 rotary valves (triangular pattern) with crook	Schönbach, Bohemia	ca. 1880	033	10/1/2011
E. Kruspe	Single, "E. Kruspe in Erfurt"	Erfurt, Germany	ca. 1870?	081	7/19/2011
Kruspe	Single F, "Kruspe in Erfurt", probably Ed. Kruspe	Erfurt, Germany	ca. 1880?	081	7/19/2011
anonymous	3 Rotary Valves in Eb	Germany?	ca.1880?	009	3/6/2002
anonymous	3 rotary valves with crooks	Germany?	ca.1885	004	3/6/2002
anonymous	3 rotary valves and 1 "Quick Change" rotary valve in F and F# with crook	Germany?	ca.1890?	013
August Bopp	Single in F, B, A based on crook	Munich, Germany	ca. 1890	085	10/31/2011
R. Schopper	Single Eb (right-handed)	Leipzig, Germany	ca. 1890	011
V.F. Cervený	3 rotary valves in F	Königgratz, Bohemia	ca. 1890?	030
Kruspe	Single F, "Kruspe in Erfurt", gold brass, terminal crook	Erfurt, Germany	ca. 1890=1905	082	7/19/2011
V.F. Cervený and Sohne	3 rotary valves with crooks in F and Eb alto, sold by Louis Viták, Chicago	Königgratz, Bohemia	ca.1903	036
V.F. Cervený and Sohne	3 rotary valves with crooks in F and Eb, sold by Louis Viták, Chicago	Königgratz, Bohemia	ca.1903	065
Gebr. Alexander	3 rotary valves in F	Mainz, Germany	ca.1900?	002	9/20/2011
Anton Holy	3 rotary valves, triangular pattern, in E-flat or A-flat	Pilsen, Bohemia	ca. 1900	077
C.F.Schmidt	3 rotary valves in Bb, s/n 19565	Berlin, Germany	ca. 1903	079
C.F. Schmidt	4 rotary valves in B-flat with an added extensions. Owned by Reginald Morley-Pegge	Berlin, Germany	ca.1905-1910	074	4/23/2011
C.F. Schmidt	Single F	Berlin S.W. 19, Germany	ca.1905-1910	067
C.F. Schmidt	Single F s/n 12567	Berlin S.W. 19, Germany	ca.1905	064
C.F. Schmidt	Single F s/n 15719	Berlin S.W. 19, Germany	ca.1905-1910	060
Friedrich Gessner	3 rotary valves, triangular pattern	Breslau, Germany	ca.1905-1910	066	7/19/2011
Willy Leonhardt	3 rotary valves, in E♭/F alto with quick change tap.	Erfurt, Germany	ca. 1905-10	072	7/19/2011
Hans Kreul	3 rotary valves, right-handed, in B-flat	Tübingen, Germany	ca. 1920	073
anonymous	3 Rotary Valves with crook in F (right-handed)	Bohemia?	1920?	027	7/19/2011
Lidl	4 Rotary Valves in F and Bb (Lehmann-Chemnitzer patent or "Waltzen"compensating design)	Brno, Czechoslovakia	ca. 1930	021
"3 Crowns" (probably Schuster & Co.)	4 rotary valves in F and Bb (right handed)	Markneukirchen?, Germany		042	7/19/2011
F. Kreisel	3 rotary valves in F	Posen, Germany		040
C.F.Schmidt	3 rotary valves and one piston valve in F and Bb	Weimar, Germany	ca. 1934	044	7/19/2011
Ed. Kruspe	Horner Model, 4 rotary valves in F and Bb, used by Mason Jones throughout his career with the Philadelphia orchestra.	Erfurt, Germany	1936	080	7/19/2011
Gebr. Alexander	4 rotary valves in Bb/High F (descant)	Mainz, Germany	ca.1950s	010	5/4/2010

Vienna Horns

Maker	Description	Location	Date	Ref.	Updated
anonymous	3 Vienna Pumpen Valves and crook (right-handed)	Vienna?, Austria?	ca.1840?	015	7/19/2011
Josef Cidrich	3 Vienna pumpen valves and crook	Brno, Moravia	ca.1870	014	7/19/2011
Erste Wiener Productiv Genossenschaft der MusikInstrumentenmacher	3 Vienna pumpen valves	Vienna, Austria	ca. 1900	038	7/19/2011

Italy

Maker	Description	Location	Date	Ref.	Updated
G.B. Cazzani	3 Rotary valves in Eb alto (right-handed)	Milan, Italy	ca. 1870	026	7/19/2011
Daniel Meinl	3 rotary valves, right-handed Italian Model, sold by Adolfo Lapini	Vienna, Austria	ca. 1870	075,
Ferdinando Roth	3 Rotary Valves (right handed Paoli Model)	Milan, Italy	ca.1875	001	3/6/2002
Maino & Orsi	3 rotary valves, right-handed, in E-flat alto	Milan, Italy	ca. 1918	074
Fernando Roth	Single Horn in Eb (right-handed)	Milan, Italy	ca. 1934	043

United States

Maker	Description	Location	Date	Ref.	Updated
Boston Musical Instrument Manufactory	3 rotary valves, single horn in F (brass)	Boston, Massachussetts, U.S.A	ca. 1870	037
Boston Musical Instrument Manufactory	3 rotary valves, single horn in F (German Silver)	Boston, Massachusetts, U.S.A	ca. 1870	052
Boston Musical Instrument Manufactory	3 rotary valves in F, s/n 12220	Bostonm, Massachusetts, U.S.A.	1893	078
C.E. Doelling	3 Rotary and 1 "Quick Change" rotary valve in E and Eb	Philadelphia, Pennsylvania U.S.A	ca. 1910	012
C.G. Conn	3 rotary valves in F, Eb, and D with tuning slide crooks	Elkhart, Indiana U.S.A.	ca. 1912	023	7/19/2011
E.A. Couturier	3 rotary valves in F "Conical Bore"	Laporte, Indiana U.S.A.	ca. 1920	056	7/19/2011
Lorenzo Sansone	5 rotary valves in F and Bb	New York, N.Y. U.S.A.	ca. 1950	028	7/19/2011