It was over 2 years after the Coronation of Queen Elizabeth II that the first of the “Castles” series of high values appeared. They have become a “classic” issue and with numerous different printers and watermarks being employed they have become a rich source for study. In 1979 a very comprehensive work on the issue by R.F. Allen was serialised in Stamp Collecting Weekly. At the time it was the most comprehensive review of the issue yet published. Covering everything from production (printers, papers, inks, perforation….) to errors and varieties, it is a work of interest and importance to any serious GB QEII specialist.
The full serialisation can be downloaded from attachment below.