|Calthrop Found At Rosna
|Calthrop found at Rosna. In the Museum of Sigmaringen.
|Calthrop From A Manuscript Of The 16th Century
|Calthrop from a manuscript of the 16th century in the Hauslaub Library in Vienna.
|Calthrop From The Water-Color Drawing Of Glockenthon
|Calthrop from the water-color drawings made by Glockenthon in 1505. In the Ambras Collection.
|Calthrop knife, 9 inches long, used in Saxony during the Seven Years War. These knives were screwed on to beams of wood and placed under water in moats. The hole in the blade was intended to put a piece of stick through so as to form a handle to screw the knife. In the Klemm Collection, Dresden.