Miniman Germanium Radio
 

Made in Japan
type: MG-302
year: 19
serial no.  
dimensions w,h,d: 2,5 cm x 10,5 cm x 2,5 cm
Links:
http://www.neatstuff.net/space-robots/communication-toys.html
http://www.transistor.org/collection/harpers/harpers4.html
cat. no. 00172
 
Enlish Instructions:
Minitter Germaphone
Swedish Instructions:
Minitter Germaphone Kristallradio