Here we go with a Model D. Now scoffers will say a B3 is the only kind of Hammond to have but they would be missing out on one of the best Hammond models ever made. This one has the Bass pedal notes 1-12 wired into the keyboards. This did not happen on the later Hammonds. The keyboards start with note 13, not note 1, therefore for walking bass this is the organ to own. 45 Leslie is wonderful.