The particular machine that we have in the collection basically takes the form of an Australian or what would we could call a blanket ballot and simply renders that in steel so you have a table of electors or elected officials and they're organized in rows by party or columns by party. There're also places with little sliding little slots that you can actually write in a candidate.
Source
Interview with Larry Bird, Smithsonian Institution's National Museum of American History, May 31, 2006.