Crystal detector with mechanism for re-locating cat's whisker on crystal. Marked ' Knivetown' and 'Friro'

Made:
1922-1928

Crystal detector with mechanism for re-locating cat's whisker on crystal. Marked ' Knivetown' and 'Friro', c. 1925

Details

Category:
Radio Communication
Object Number:
1983-28
type:
crystal detector