Notes: "These items were all part of a gift package from Hans Dennert to all the attendees of the first International Meeting of Slide Rule Collectors in Utrecht, Netherlands, in November 1995. There were originally five items in this package, but two are missing. The remaining items are the Aristo MonoRietz No. 803, a 12.5 cm slide rule designed for the South American market, the Aristo Commerz III No. 623 circular commercial calculator, and the Aristo GeoLiner No. 1551/1, a very handy and compact ruler, square, and protractor. "
