The drawings above represent 24 shapes of Baird keys and were taken from a Reed Code Book. One of the problems that might be associated with these double-sided keys was that of classification, and their representation as images. This is typical of the information available to the technician. The technician tasked with making a key from the information given above was faced with other problems. The suggestion was to cut out the picture, affix it to a keyblank and carefully cut the key without cutting beyond the outline. This could be a difficult process, and of course with no copiers in the 1920s, the page had then been defaced as well. Compare this to the chart below, also from a Reed Code Book, which defines 50 different single-sided keys reduced to numbers. In this case only one image "might" be required - one that shows the specifications for the different depths and spaces. Twice the information in less than half the space.
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