Hi Don - there is a Plate Number Single Catalog by "Herbert" - I don't have this volume, but here is one on
ebay:
http://www.ebay.com/itm/2011-Hebert...em2583e70a9aHere is a description:
Quote:
All new and updated. Latest 2011 edition of Hebert's Reference Guide of Plate Number Singles. Lists plate numbers, positions and mint and used prices for all U.S. plate number singles (PNS), plate number coils (PNC), ZIPs, Copyrights and other marginal markings for U.S. stamps from the 1893 Columbians on. Expanded listings for airmails, dues, ducks, special delivery, postal note, parcel post, officials, newspaper stamps and other back-of-the-book issues. New this edition: PNS listings and prices for Canal Zone, Guam, Puerto Rico, Cuba and Philippines overprints. Over 500 pages! Can be used as a checklist, want list or inventory list. Published by the American Plate Number Single Society (APNSS), an APS affiliate.
Published as comb-bound volume. Also available as 3-hole punched pages. Optional 3-hole binder for additional $3.50.
Shipped by Media Mail to U.S. addresses. Priority Mail available for additional cost. Non-U.S. bidders welcome, please email for shipping options and actual postage cos