The following list of numbers represents the date of manufacture followed by the piano serial numbers. The letters ‘sn’ mean serial number.
Piano Manufacturer: Mathushek
1900 sn-36000 1931 sn-78500 1935 sn-82500 1952 sn-338000
1910 sn-51000 1932 sn-79000 1936 sn-84000 1954 sn-346000
1920 sn-66000 1933 sn-79500 1939 sn-87800 1956 sn-349500
1930 sn-77500 1934 sn-81000 1940 sn-88300 1958 sn-345200
Piano Manufacturer: Mehlin & Sons
1900 sn-19000 1931 sn-43400 1935 sn-43880 1952 sn-51600
1910 sn-29000 1932 sn-43500 1936 sn-44000 1954 sn-55831
1920 sn-40000 1933 sn-43600 1939 sn-44600 1955 sn-56536
1930 sn-43300 1934 sn-43700 1940 sn-44800 1960 sn-60100
1960 sn-364200 1966 sn-397700 1972 sn-420500 1978 sn-440000
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
1965 sn-392000 1971 sn-415600 1977 sn-438000
Piano Manufacturer: Meldorf
1956 sn-160000 1959 sn-169000 1962 sn-180000 1965 sn-191000
1957 sn-163100 1960 sn-172000 1963 sn-183000 1966 sn-191800
1958 sn-166000 1961 sn-176000 1964 sn-187000 1967 sn-192000
Piano Manufacturer: Melodigrand Aeolian 64 And 73 Note Pianos
1949 sn-1000 1952 sn-6100 1955 sn-9300 1958 sn-12110
1950 sn-3200 1953 sn-7200 1956 sn-10300 1959 sn-13206
1951 sn-4400 1954 sn-8500 1957 sn-11114 1960 sn-14006
Piano Manufacturer: Melodigrand Poole/Ivers & Pond Numbers
1965 sn-928000 1970 sn-146000 1975 sn-177000 1980 sn-208700
1966 sn-109700 1971 sn-153400 1976 sn-185900 1981 sn-214200
1967 sn-119400 1972 sn-160600 1977 sn-189000 1982 sn-221200
1968 sn-132800 1973 sn-167600 1978 sn-194000 1983 sn-221800
1964 sn-100442 1969 sn-120000 1974 sn-135600 1979 sn-145600
1965 sn-104300 1970 sn-121900 1975 sn-137500 1980 sn-148000
1966 sn-109800 1971 sn-124900 1976 sn-140900 1981 sn-150500
1967 sn-112300 1972 sn-127200 1977 sn-142800 1982 sn-145300
1968 sn-116000 1973 sn-130700 1978 sn-144000 1983 sn-162845
Piano Manufacturer: Melville Clark
1901 sn-2075 1913 sn-22000 1925 sn-63000 1934 sn-134000
1910 sn-16000 1915 sn-24400 1930 sn-118000 1935 sn-136000
1911 sn-17800 1920 sn-40000 1932 sn-130000 1927 sn-150000
Piano Manufacturer: Mendelsohn
1900 sn-7000 1919 sn-26000 1922 sn-63000 1925 sn-32000
1910 sn-17000 1920 sn-27000 1923 sn-30000 1927 sn-34000
1915 sn-22000 1921 sn-28000 1924 sn-31000 1929 sn-36000
1930 sn-98000 1935 sn-125000 1939 sn-170000 1952 sn-278000
1932 sn-106000 1936 sn-135000 1940 sn-183000 1954 sn-315000
1933 sn-110000 1937 sn-153000 1946 sn-225000 1957 sn-340000
1934 sn-118200 1938 sn-163800 1949 sn-254000 1959 sn-356270
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
Piano Manufacturer: Miller, Henry F. Aeolian
1900 sn-28500 1915 sn-45000 1935 sn-54200 1952 sn-60400
1905 sn-35000 1920 sn-49000 1940 sn-56200 1954 sn-60590
1908 sn-37200 1925 sn-51000 1946 sn-58900 1957 sn-66800
1910 sn-38500 1930 sn-53200 1949 sn-60000 1959 sn-78454
Piano Manufacturer: Poole/Ivers & Pond Numbers
1960 sn-89744 1966 sn-123500 1972 sn-143800 1978 sn-153600
1961 sn-96939 1967 sn-128200 1973 sn-146100 1979 sn-155400
1962 sn-102629 1968 sn-131600 1974 sn-148700 1980 sn-156400
1963 sn-108029 1969 sn-133300 1975 sn-150900 1981 sn-157300
1964 sn-111744 1970 sn-136100 1976 sn-151900 1982 sn-157900
1965 sn-118400 1971 sn-139900 1977 sn-152300
Piano Manufacturer: Minipiano Hardman, Peck
1960 sn-121100 1966 sn-134300 1972 sn-142900 1978 sn-150900
1961 sn-123400 1967 sn-136000 1973 sn-144700 1979 sn-150300
1962 sn-126200 1968 sn-138000 1974 sn-146500 1980 sn-151100
1963 sn-128500 1969 sn-139800 1975 sn-147600 1981 sn-151800
1964 sn-130500 1970 sn-140300 1976 sn-148700 1982 sn-152200
1965 sn-132000 1971 sn-141100 1977 sn-149900
Piano Manufacturer: Monarch By Baldwin
1900 sn-9000 1930 sn-217000 1933 sn-238000 1938 sn-282000
1910 sn-57000 1931 sn-223000 1934 sn-247000 1940 sn-300000
1920 sn-127000 1932 sn-232000 1935 sn-251800 1941 sn-302000