Horn-u-Copia

An Index to Keefer Instruments



YearNumber
1910 600
1911 1200
1912 1800
1913 2600
1914 3400
1915 4200
1916 5452
1917 6023
1918 6368
1919 7671
1920 9680
1922 10,271
1924 12,866
1925 13,200
1926 14,400
1927 15,600
1928 16,800
1929 18,446
1930 19,877
1931 19,900
1932 20,400
1933 20,900
1934 21,300
1935 21,700
1936 22,200
1937 22,700
1938 23,300
1939 24,008
1940 24,700
1941 25,000
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