A Spitzflöte (or Spitzprinzipal, according to Irwin) at 2-2/3', 1-1/3' (according to Audsley), or rarely 5-1/3' (according to Irwin). At least one example at 10-2/3' pitch is also known (see below).
Osiris contains two examples each of Nassat Quint and Spitz Quint, shown below, and twenty-two examples of Spitzquinte, nine at 1-1/3' and the rest at 2-2/3'. No examples of Quintspitz are known. Contributions welcome.