Set of Trocars and Cannula This is a set of metal trocars with detachable cannulae. One trocar is blunt-ended, whereas the other has a sharp end. On the handle, the blunt trocar is engraved with “Down Mayer,” and the other with “British Made”. Signs of wear and tear present. Part of the Dr Diarmuid O’Driscoll Collection. 1925-1975