Just picked up a 1930s Battery operated Coronado

[vortalexfan]

Hello everyone, today I just picked up a 1930s vintage battery operated Coronado Radio of which I don't know the model number and I'm trying to locate the service literature for it.

It is in really decent shape yet, but someone at some point in time wired a power cord up to the antenna hookup and I'm hoping no one actually attemped to plug it in that way otherwise this radio may be a shelf queen, it looks really clean underneath as well and looks like there was no servicing done to the radio (except to the battery cables and the addition of the power cord onto the antenna hookups.)

what kind of batteries were used to power this radio and does anyone have any idea which model this might be?

pictures below.