Manufacturer : Atwater Kent Type : model #40 Produced : 1928 - U. S. A. Frequency range : MW Receiving mode : direct Tubes : #26, #26, #26, #27, #26, #71, #80         -all seven tubes made by RCA Cunningham U. S. A. Speaker, phones : Atwater Kent , type E2 ( 750 ohms )          (shows picture below) Power supply : 110 V/ 40-60 Hz Receiving estimation (1-10) : 8 Global estimation (1-10) : 8 Specials : needs long wire antenna and ground Note : very often receiver in the U. S. A. for that time External speaker Manufacturer : Atwater Kent Type : E2 Manufactured : 1926 - U. S. A. Specials : all technical data are available on the picture of actual site! Note : does work!