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England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
20120819
England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
20120818
England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
20120817
England, Kent, Denge, 20ft and 30ft Experimental Sound Mirrors built in 1928 and 1930, precursor to RADAR, at Greatstone.
England, Kent, Denge, 20ft Experimental Sound Mirror built in 1928, precursor to RADAR, at Greatstone.
20120816
England, Kent, Denge, 20ft Experimental Sound Mirror built in 1928, precursor to RADAR, at Greatstone.
England, Kent, Denge, 200ft Experimental Sound Mirror built in 1930, precursor to RADAR, at Greatstone.
20120815
England, Kent, Denge, 200ft Experimental Sound Mirror built in 1930, precursor to RADAR, at Greatstone.
England, Kent, Denge, 20ft Experimental Sound Mirror built in 1928, precursor to RADAR, at Greatstone.
20120814
England, Kent, Denge, 20ft Experimental Sound Mirror built in 1928, precursor to RADAR, at Greatstone.
England, Kent, Denge, 30ft Experimental Sound Mirror built in 1930, precursor to RADAR, at Greatstone.
20120813
England, Kent, Denge, 30ft Experimental Sound Mirror built in 1930, precursor to RADAR, at Greatstone.