Desk telephone transmitter and receiver (sectioned), 1926.
1926
1926
1927
circa 1930
1930
1928
1927
1924
1927
1930
1934
1928
1955; 1830
1927
circa 1930
1926
1926
2000-100 BCE
1928
before 1928
1927-1929
circa 1927
circa 1930
1930
circa 1927
1926-1928
1990-96
1930
1927
1927
1934
1926
1929
1930
1930 (replica); 1834 (original)
1926
1926
1928
1903 (original); 1982 (model)
4000-2001 BCE
1929
circa 1929
1930
1830 (original); 1967 (model)
1801-1892 (prepared); 1946 (element replaced)
1930
circa 1930s (original 1861)
1928
1930
1930
1929