Computer Measuring
The Penny Black and Penny Red


Start - Instructions - Measure - Comparator


In the early 1970's Roland Brown devised a means of measuring the check letter positions of the Penny Black and the Penny Red. He devised a transparent gauge that when overlaid on a stamp and aligned with the frame lines could measure the letter position to 1/30th of a millimeter.

Harold Fisher joined forces with Roland and early in 1972 the first of what would come to be five volumes was released covering the first 45 plates. Within 6 months the printing had sold out and increasing numbers of inquiries about continuing volumes were coming in from those interested in plating.

After completing more than half of the data necessary (about 50,000 measurements per volume!) for Volume 3, Roland was no longer able to continue. Harold picked up the onerous task of completing the work of the Die I plates. He had hoped to continue on with the Die II plates, but sadly, this was not completed before his death.

In the early 1980's I discovered the four then extant volumes and began my plating interests. Being also an early adopter of computers I'd thought them applicable to the task of winnowing out the data sets when confronted with my less than accurate, beginner's measuring skills. With three books for Alphabet I and another for II, plus the 'ranging', it's a very hard task to find every possible 'near' match. After some letters were exchanged, Harold allowed me to enter the positional data into a database that would accept the four measurements, range and compare and deliver a list of 'possibles'.

Thus was born my "Index To The Plating Of The Penny". To avoid copyright infringement, the printed copies contained no notations, only a datum set and the possible matches within a +/- 2 'step' variance. They occupied a set of four spiral bound books with nearly 1,000 pages. Later, with the advent of the Internet, this database went 'on line' and has been successfully used by many platers.

In recent years, the books have become increasingly harder to find for newer platers, especially copies of the gauge. In 2002 I proposed through the pages of the GBJ (Vol. 40 No. 3) a computerized gauge to be used with graphics programs that could handle layers. Recently Allan Oliver came up with the idea of having the gauge be 'floating' on an HTML page, much as some menus are now done. For this experiment, he used my "E-Gauge".

We then joined forces to complete this plating tool. Expanding upon his idea of not only positioning the gauge with a mouse, we added buttons to shift it by one pixel in any direction for final positional accuracy and a means of selecting the stamp image to be plated. A final enhancement was to add file access to select the stamp to be plated from the user's hard drive. Thus this current set of tools.

In addition to this history of the plating books and gauge, an Instructional page is linked to provide datum point examples and other information. The plating for all four measurements is on the Measure page.

This group of pages was produced with the idea of packaging it so that users could download and install on their computers. It will also be available to use on line at Allan's web site.

The concept employed with the off line set, is that you should assemble a list of stamps containing the Check Letters and the four measurements, then go on line and use my Index.

As the Index has a 'printable' pop-up window, you may thus copy and paste (or actually print!) the possibles for your measurements. Then go off line and continue to refine your identification of the stamp(s) in question.

Once again, the Index has none of the aditional information contained within the Fisher/Brown books. You need your own set. However, with the available Imprimatur images, some website examples of plates, Proud, Litchfield, Statham and Seymour, it is possible to plate many copies. Having the Fisher/Brown books make it just that bit more organized in quickly slimming down the list of possible plates.

Good Hunting!

John A. McCulloch


Start - Instructions - Measure - Comparator


Updated 12 / 27 / 2007