Euphoniums and Baritones by Frank Holton & Company at the National Music Museum. Like most American manufacturers, Holton listed these models as both "baritones" and "euphoniums," depending on the catalog and year.

NMM 13,827 Euphonium in Bb. Serial number 521995. Model B101 Falcone Artist Upright. 1973. Made in Elkhorn, Wisconsin. Length 2632 mm. Holton Factory Reference Collection. 

NMM 13,828 Euphonium in Bb. Serial number 2090. Model B601R. 1980-1989. Made in Japan. Length 2680 mm. Holton Factory Reference Collection. 

NMM 13,837 Euphonium in Bb. Serial number 152572. Model 182 Upright. 1942. Made in Elkhorn, Wisconsin. Length 2705 mm. Holton Factory Reference Collection. 

NMM 13,829 Euphonium in Bb. Serial number 20862. The Holton Euphonium, Double-Bell. 1913-1914. Made in Chicago, Illinois. Length 2782 mm. Holton Factory Reference Collection. 

NMM 1968 Euphonium in Bb. Serial number 45867. Model 82 Long Model Euphonium. 1919. Made in Elkhorn, Wisconsin. Arne B. Larson Collection. 

NMM 14,487 Euphonium in Bb. Serial number 474675. Long Mammoth American Model 83. 1919. Made in Elkhorn, Wisconsin. Arne B. Larson Estate. 

NMM 13,824 Euphonium in Bb. Serial number 109269. Model 188 Collegiate. 1931. Made in Elkhorn, Wisconsin. Length 2667 mm. Holton Factory Reference Collection. 

NMM 13,814 Euphonium in Bb, Double bell. Serial number 151818. Model 89 Revelation Pryorphone. 1942. Made in Elkhorn, Wisconsin. Holton Factory Reference Collection.

NMM 13,845 Euphonium in Bb. Serial number 506158. Model Collegiate B626. ca. 1973-1983. Made in Elkhorn, Wisconsin. Length 2647 mm. Holton Factory Reference Collection. 

NMM 13,840 Euphonium in Bb. Serial number 397474. Artist Recording Baritone B311 or I311. 1965. Made in Elkhorn, Wisconsin. Length 2649 mm. Holton Factory Reference Collection. 

NMM 3618 Euphonium in Bb, Double bell. Serial number 93447. Model 89 Pryophone (Revelation). 1927. Made in Elkhorn, Wisconsin. Length 2759 mm., 2805 mm. Gift of George Hendricks, Etna, California.

NMM 13,844 Euphonium in Bb. Serial number 36597. Model 86 Long Mammoth Model with Double Bell. 1916. Made in Chicago, Illinois. Length 2671 mm. Holton Factory Reference Collection. 

NMM 13,833 Euphonium in Bb. Serial number 31190. Model 83 Revelation Euphonium. 1914-1918. Made in Chicago, Illinois and Elkhorn, Wisconsin. Length 2665 mm. Holton Factory Reference Collection. 

NMM 14,430 Euphonium in Bb. Serial number 48506. Model 82 Holton Revelation. 1920. Made in Elkhorn, Wisconsin. Length 2658 mm. Gift of Craig Anderson, Elkhorn, Wisconsin. 

NMM 13,819 Euphonium in Bb. Serial number 3125. Model B625R. ca. 1980-2000. Made in Japan. Length 2624 mm. Holton Factory Reference Collection.

NMM 960 Euphonium in Bb. Serial number 18287. The Holton Euphonium. 1912. Made in Chicago, Illinois. Length 2769 mm. Arne B. Larson Collection. 

NMM 13,843 Euphonium in Bb. Serial number 148667. Model 185 Recording Baritone. 1941. Made in Elkhorn, Wisconsin. Length 2672 mm. Holton Factory Reference Collection. 

NMM 13,825 Euphonium in Bb. Serial number 34163. The Holton Euphonium. 1916. Made in Chicago, Illinois. Length 2558 mm. Holton Factory Reference Collection. 

NMM 13,839 Euphonium in Bb. Serial number 85374. Model 84 Revelation Pryorphone. 1924. Made in Elkhorn, Wisconsin. Holton Factory Reference Collection. 

NMM 13,826 Euphonium in Bb. Serial number 002023. Model B625R. 1980-1985. Made in Japan. Length 2683 mm. Holton Factory Reference Collection. 

NMM 13,832 Euphonium in Bb. Serial number 3920. Model B601R. 1990-2000. Made in Japan. Length 2658 mm. Holton Factory Reference Collection. 

NMM 13,818 Euphonium in Bb. Serial number 1127. Model B302R. ca. 1980s. Made in Japan. Length 2665 mm. Holton Factory Reference Collection. 

NMM 4648 Euphonium in Bb. Serial number 79325. Model 82 Long Model Euphonium. 1923. Made in Elkhorn, Wisconsin. Length 2650 mm. Arne B. Larson Estate. 

NMM 13,836 Euphonium in Bb. Serial number 202798. Model 539 Collegiate Recording Baritone. 1949. Made in Elkhorn, Wisconsin. Holton Factory Reference Collection. 

NMM 13,842 Euphonium in Bb. Serial number 88138. Model 82 Long Model Euphonium. 1923-1924. Made in Elkhorn, Wisconsin. Elkhorn, Wisconsin. Holton Factory Reference Collection. 

NMM 13,835 Euphonium in Bb. Serial number 7332. The Holton Euphonium. 1909. Made in Chicago, Illinois. Probably HP. Holton Factory Reference Collection. 

NMM 912 Euphonium in Bb. Serial number 12898. Long Model Euphonium (Model 82). 1911. Made in Chicago, Illinois. Length 2614 mm. Arne B. Larson Collection.

NMM 13,822 Euphonium in Bb. Serial number 1027. Model B302R. ca. 1968-1974. Made in Elkhorn, Wisconsin [or Final Assembly]. Length 2632 mm. Holton Factory Reference Collection. 

NMM 13,816 Euphonium in Bb. Serial number 124840. Model 85 Revelation Pryorphone, Bell front. 1938. Made in Elkhorn, Wisconsin. Holton Factory Reference Collection.