Fisher-Brown Measurements and Plating Notes for Position IA by Plate
Links in blue in the first column are to the picture of the registration sheet for the plate on the website of The Postal Museum. A link in red means that this lettering has been removed from the sheet (or there is no sheet for that plate), and goes instead to the appropriate page of Ian Wright's "Missing Imprimatur" database, which may have examples of issued stamps from the plate with this lettering.
The additional plating notes from the books have now been included in this version of the tool, and can be displayed as either the modified and extended set of abbreviations that are used in Mike Batty's revised work A Rearrangement Into Numerical Order of the Fisher-Brown Measurements ..., or as plain English text. You can switch between them, and between showing all plates or just the ones matched above, by clicking the buttons below.
If you think a stamp is from a particular plate, but want to check for alternatives, you can click the "Use" button in the appropriate row to insert the actual measured values for that plate into the search boxes above, then click "Search" to find other plates whose measurements are close.
Please note that these plating notes are currently being actively re-examined with the benefit of the latest information, so should be considered as a cross-check for difficult stamps rather than a primary determinant – the letter position measurements should be evaluated first.
Please contact if you come across anything that appears to be incorrect.