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