The following list of numbers represents the date of manufacture followed by the piano serial numbers. The letters ‘sn’ mean serial number.
Piano Manufacturer: Bay. H.C.
1914 sn-3000 1918 sn-8000 1922 sn-14000 1926 sn-19200
1915 sn-4000 1919 sn-9500 1923 sn-15500 1927 sn-20300
1916 sn-5000 1920 sn-11000 1924 sn-17000 1928 sn-22000
1917 sn-6500 1921 sn-12500 1925 sn-18000 1929 sn-23000
Piano Manufacturer: C. Bechstein
1853 sn-176 1959 sn-150600 1980 sn-173785 1992 sn-184968
1860 sn-8070 1960 sn-151950 1990 sn-184299 1994 sn-185670
1910 sn-94753 1970 sn-162300 1991 sn-184625 1996 sn-186144
Piano Manufacturer: Becker Bros.
1905 sn-33000 1920 sn-52800 1927 sn-57200 1937 sn-59890
1910 sn-41000 1921 sn-53600 1928 sn-58000 1938 sn-61000
1915 sn-46400 1922 sn-54800 1929 sn-58500 1939 sn-62600
Piano Manufacturer: Behr Bros.
1908 sn-17000 1918 sn-33400 1921 sn-40000 1930 sn-75000
1916 sn-29000 1919 sn-36000 1922 sn-42000 1931 sn-26700
1917 sn-31000 1920 sn-20600 1929 sn-68000 1932 sn-81000
1955 sn-503000 1965 sn-579000 1972 sn-653500 1979 sn-737000
1958 sn-521000 1966 sn-589000 1973 sn-660000 1980 sn-754000
1960 sn-535000 1967 sn-601500 1974 sn-683000 1981 sn-767000
Piano Manufacturer: Bent, George P.
1900 sn-15000 1910 sn-50000 1920 sn-72300 1928 sn-94000
1905 sn-33000 1915 sn-64000 1927 sn-89000 1929 sn-98000
Piano Manufacturer: Bent George P. By Winter & Co. (Aeolian)
1960 sn-364200 1966 sn-397700 1972 sn-420500 1978 sn-440000
1961 sn-370700 1967 sn-401500 1973 sn-424900 1979 sn-444000
1962 sn-376900 1968 sn-405200 1974 sn-430300 1980 sn-446900
1963 sn-383100 1969 sn-407500 1975 sn-433400 1981 sn-449700
1964 sn-387900 1970 sn-410900 1976 sn-436900 1982 sn-452400
Piano Manufacturer: Bjur Bros.
1900 sn-10000 1930 sn-266000 1942 sn-300200 1950 sn-408000
1910 sn-30000 1935 sn-274000 1947 sn-401000 1951 sn-412000
1920 sn-50000 1940 sn-289000 1948 sn-403000 1952 sn-416000
1925 sn-60000 1941 sn-295000 1949 sn-406000 1953 sn-420000
Piano Manufacturer: Bjur Bros. Same Serial Numbers as Brambach
By Kohler & Campbell After 1955.
1955 sn-503000 1965 sn-579000 1972 sn-653500 1979 sn-737000
1958 sn-521000 1966 sn-589000 1973 sn-660000 1980 sn-754000
1960 sn-535000 1967 sn-601500 1974 sn-683000 1981 sn-767000
1961 sn-542000 1968 sn-611000 1975 sn-695000 1982 sn-780000
1962 sn-551000 1969 sn-621000 1976 sn-708500 1983 sn-795491
1963 sn-560000 1970 sn-631500 1977 sn-712000
Piano Manufacturer: Bluthner
1920 sn-100000 1943 sn-127000 1965 sn-137500 1987 sn-153500
1925 sn-101500 1946 sn-128000 1970 sn-140000 1988 sn-154000
1930 sn-115000 1950 sn-128800 1975 sn-142000 1990 sn-155000
1935 sn-119500 1955 sn-130600 1980 sn-145000 1995 sn-157500
1940 sn-125500 1960 sn-133006 1985 sn-152500 1996 sn-158000
Piano Manufacturer: Bond
1912 sn-10000 1916 sn-14000 1920 sn-18000 1924 sn-22000
1914 sn-12000 1917 sn-15000 1921 sn-19000 1925 sn-23000
1915 sn-13000 1918 sn-16000 1922 sn-20000
Piano Manufacturer: Bosendorfer
1900 sn-15640 1935 sn-25700 1950 sn-26960 1970 sn-29109
1910 sn-19640 1940 sn-26290 1955 sn-27490 1975 sn-30622
1920 sn-22530 1944 sn-26730 1960 sn-27900 1980 sn-33444
1930 sn-25350 1948 sn-26830 1965 sn-28434 1985 sn-34155
Piano Manufacturer: Bradbury
1900 sn-29400 1930 sn-98000 1942 sn-204000 1949 sn-254000
1910 sn-35700 1935 sn-125000 1943 sn-210000 1951 sn-266000
1920 sn-40000 1940 sn-183000 1947 sn-243000 1952 sn-300000
1925 sn-40300 1941 sn-193000 1948 sn-250000 1953 sn-305000
1960 sn-364200 1966 sn-397700 1972 sn-420500 1978 sn-44000
1961 sn-370700 1967 sn-401500 1973 sn-424900 1979 sn-44400
1962 sn-376900 1968 sn-405200 1974 sn-430300 1980 sn-44690
1963 sn-383100 1969 sn-407500 1975 sn-433400 1981 sn-44970
1964 sn-387900 1970 sn-410900 1976 sn-436900 1982 sn-45240
1965 sn-392000 1971 sn-415600 1977 sn-438000