Material from the following reknowned collections has been incorporated in this inventory:

Henry G. Brock, sold 15 March 1941 by Eugene Klein of Philadelphia, PA;
Ferrars H. Tows, sold 7 January 1949 by Carl E. Pelander of New York City, NY.;
John C. Juhring, sold 25 October 1978 by Stanley Gibbons of Frankfurt, West Germany;
Peter A. Robertson, sold 15 March 1988 by Christie's Robson Lowe of NYC, N.Y.;
Ignacio Prats, sold 24 June 2006 by Greg Manning Auctions, West Caldwell, N.J.

Additionally, examples from many other auctions with holdings of these stamps
have also been included and are referenced in the body of the inventory.

If you have any examples of these stamps or covers and would like to help this project, please send me scans of stamps at a resolution of 600 dpi (dots per inch) and of covers at 150 dpi with closeups of the stamps on the cover at 600 dpi.

WARNING: The fact that a stamp appears on this archive is not a guarantee of its authenticity
unless it is accompanied by a certificate of authenticity from a recognized authority.
Auction houses cannot be expected to be experts on the stamps they sell.

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