In 6 vols.
The G.B.P.S. line-engraved plating gauge in pocket.
Cover title: Queen Victoria : the plating of the penny, 1840-1864.
The plating of the penny, 1840-1864 : a tabulation of the measured positions of the check-letters and other relevant data arranged for easy plate identification by Roland Brown. ISBN 0901512125. Published by G.B. Philatelic Publications Ltd for the Great Britain Philatelic Society in 1976. Publication and catalogue information, links to buy online and reader comments.