'Progress' toy gyroscope, 1950-1960
1950-1960
1950-1960
1936-03-10
1967
1943
21 October 1943
21 October 1943
21 October 1943
1985
17 July 1955
01 August 1958
1964-07-06
1975-1979
21 October 1943
1961
21 October 1943
21 October 1943
15 August 1958
01 August 1958
21 October 1943
29 May 1966
01 August 1958
01 August 1958
24 April 1951
01 August 1958
01 August 1958
1920-1930
1938
1958
1894-1900
1901-1911
unknown date
1989
(circa 1967); 2013
1941
(1967); 2013
1941
1989
(circa 1967); 2013
1941
1980
1969
1941
1941
1926