Two short fragments resulting from experiments in controlling the mechanical development of the instrument. Preserved by the Academy Film Archive in 2005.
1944-02-09
1981-07-13
1949-01-29
1969-07-10
1951-01-01
1943-12-21
1953-01-01
1946-02-03
1977-01-01
1982-10-01
1975-01-01
1987-01-01
1951-02-05
1977-11-27
1990-05-18
1993-12-17
1996-03-07
1930-10-01
1980-12-22
1979-03-17
1974-10-01