New articles charting the introduction of the Wilding and Machin designs have been written for the catalogue by Frank Walton RDP and Douglas Muir RDP, respectively.
The catalogue is illustrated in colour for the first time, with new clear pictures of the plate and cylinder flaws which are currently enjoying such a resurgence of popularity with collectors.
New expanded and fully-priced listings of the imprimaturs now released from the archives of the Postal Museum have been included in all sections, including varieties and cylinder blocks.
Coil leaders are now priced for the first time.
The booklet sections have been transferred out of the Appendix to follow their relevant booklet pane sections, and expanded with additional production notes.
The notes on the Postage Due watermarks have been improved, with clear new illustrations.
The Postage Rates appendix has been expanded to meet the needs of the growing number of collectors interested in the postal history of this period.
The catalogue has been carefully repriced throughout, following consultation with specialist collectors and dealers.