This stop is mentioned only by Adlung, who cites a 16' example but does not define it. The German word weit means �wide� or �distant�; from this we can surmise that it is most likely wide-scaled Prinzipal, or possibly an Echo Principal.
Osiris contains four examples of this stop at 8' pitch, three each at 4' and 2', and one example at 16'. All are from the 20th century.