Hi Bryan, It sounds like a large 9 volt battery, is it a transistorised set? Does the set have a label in the battery compartment with a battery number listed? You might be able to get an answer at German Radio Wumpus at http://www.oldradios.de/ . If it's transistorised list the transistor types, particularly the output transistors, may be numbers like 0C74. Cheers, Don Black.
: Can anyone tell me what the voltage was of the battery that goes in this radio? The connector has two long pins, one larger than the other. Thanks.