ID: 
1351
Maker's Name: 
Cinaudagraph Corp, Stamford, Conn.
Where made: 
USA
c. 1945
Dimensions: 
23 × 8 × 18 cm

Two Alnico horns on an iron base originally provided the magnetic field for a WWII magnetron. An aluminium plate and supports were added by UQ Physics Workshop for use in lecture demonstrations.