In late 1858 the post office decided to begin perforating stamps to facilitate quick and accurate separation. It was decided that the 1/2d, 3d and 6d values of the erlier pence issue would be issued thus, the 12d, 10d and 7.5d values being discontinued. The perforation used measures 11.75 on all sides. This issue was very short lived, as Canada adopted decimal currency on July 1, 1859. Since the 1/2d rose was issued in December 1858, and the 3d and 6d values were issued in January 1859, this means that the issue had a life of around 5-6 months. Consequently only 850,000 of the 1/2d, 450,000 of the 3d and 70,000 of the 6d were issued. For a 19th century stamp issue for a country as populous as Canada was even back then, this is an absolutely miniscule quantity. As a result these are among the most elusive regular issues. If you are a perfectionist, prepare to be extremely frustrated, as these stamps are almost never found with perforations cleearing the outer framelines on all four si...