Below is the character set from Mac McGrew's American Metal Typefaces of the Twentieth Century. When you encounter it, you will likely find it beveled, drop-shadowed, stretched, hand-drawn or uppercased. You may find other typefaces mixed in. Photographs of Hobo in all its iterations are welcomed. Upload and view the photographs in the flickr group.
Hobo is currently sold and distributed by Linotype.
Bastardized Hobo, or questionable Hobo, is also great: