'Progress' toy gyroscope, 1950-1960
1950-1960
1950-1960
1936-03-10
1967
1975-1979
21 October 1943
1958
1943
21 October 1943
1985
17 July 1955
21 October 1943
1964-07-06
01 August 1958
21 October 1943
21 October 1943
1938
01 August 1958
29 May 1966
1961
21 October 1943
15 August 1958
21 October 1943
24 April 1951
01 August 1958
01 August 1958
01 August 1958
01 August 1958
1894-1900
1920-1930
1951
1951
unknown date
1901-1911
1989
(circa 1967); 2013
1989
1941
1962
(1967); 2013
1941
(circa 1967); 2013
1941
1941
1968
1941
1969