
'Progress' toy gyroscope, 1950-1960
1950-1960
1950-1960
1964-07-06
1936-03-10
1961
1943
21 October 1943
21 October 1943
21 October 1943
1975-1979
17 July 1955
21 October 1943
01 August 1958
1938
01 August 1958
21 October 1943
01 August 1958
1958
15 August 1958
21 October 1943
21 October 1943
29 May 1966
01 August 1958
01 August 1958
01 August 1958
24 April 1951
1920-1930
1985
1967
unknown date
2001-10-05
(1967); 2013
(circa 1967); 2013
(circa 1967); 2013
1901-1911
1989
1989
2008 (2010)
1975-11
1980
1962
1951
1941
1941
1941
1941