Less common differences include a descender on the "z" and a ball on the finishing stroke of an "h", which curves back to resemble a "b" somewhat. Sometimes the "w" is of a form taken from old German typefaces, in which the left half is of the same form as the "n" and the right half is of the same form as the "v" in the same typeface. There also exist specialised ligatures for italics, such as when "sp" is formed by a curl atop the "s" that reaches the small ascender at the top of the "p".