Hebert's 2024 Catalog of Plate Number Singles has arrived.

It is massive, almost 2 inches thick. Three times the size of my dog-eared 2007 edition. It is even bigger than the last US Scott Specialized catalog before they removed the Proofs and other sections.
I like that it is in a checklist format for every plate number and position known. Durland has checkboxes for some catalog numbers and positions, but lists many issues with just a big paragraph of plate numbers rather than checkboxes for every number and position. I'm sure they do that to save space, but it makes it impossible to use Durland as a complete checklist.
The 2024 Hebert also lists many sub-types based on the location of the plate number in the selvedge. For example, Scott #300 top plate #2916 is listed as a Type I if the 9 is above the D, and a Type II if the 9 is above the S. I am guessing this is because the plate number isn't in exactly the same position in the upper left and upper right panes of the sheet. The previous catalog listed just 4 positions for this stamp (T L B R), and that's how I collect them. Now there can be up to 6 variations for each plate number. I'm not sure how I feel about this. I shudder at the effort to go through all my duplicates to look for the new types. Some catalog numbers that I thought were complete are no longer complete. On the bright side, I will never run out of new things to collect.
Curiously, I don't see any separate types listed for left or right numbers, only top and bottom. I haven't read the introduction yet to get all the details. All-in-all it is an impressive work.
Available from the Editor via eBay.
https://www.ebay.com/itm/166489967346More details from the product announcement:
The all new 2024 edition of the Hebert's Catalogue of Plate Number Singles is now available! Features in the 2024 edition include
• 792 pages – over 200 pages of new listings
• All new issues through the end of 2023
• All new Scott listings – tagging varieties, special booklet paper, more
• Thousands of price changes
• Over 7,000 additional listings of plate position types
• Hundreds of plate position types for modern issues, booklet singles
• Greatly expanded back-of-the-book sections, including PNS for revenues, documentary,
proprietary, stock transfer, wine stamps and more
• Expanded listings for overprints for use in U.S. possessions – Cuba, Puerto Rico, Philippines, Guam
• Expanded PNS listings for all Canal Zone issues, both U.S. overprints and regular CZ issues
• Same large print format for easy readability
• Pre-punched pages easily inserted in your 3 ring binder
• Use as a reference, inventory checklist, want list