'Progress' toy gyroscope, 1950-1960
1950-1960
1950-1960
1975-1979
1936-03-10
1964-07-06
1961
1943
1938
1958
21 October 1943
21 October 1943
17 July 1955
21 October 1943
21 October 1943
21 October 1943
06 August 1945
01 August 1958
01 August 1958
01 August 1958
15 August 1958
1985
circa 1925
1967
21 October 1943
21 October 1943
06 August 1945
01 August 1958
01 August 1958
01 August 1958
24 April 1951
29 May 1966
1980
1975-11
1901-1911
2008 (2010)
1989
1989
2001-10-05
1962
unknown date
(1967); 2013
(circa 1967); 2013
(circa 1967); 2013
1941
1941
1941