There has been a discussion about how £sd was represented on punch cards at Wikipedia. Editors have dug out the PL/1 and COBOL manuals from the '60s to show this. See page 143ff at http://bitsavers.trailing-edge.com/pdf/ibm/360/os/cobol/C28-6516-2_IBM_OS360_COBOL_Language_Dec64.pdf For the discussion see https://en.wikipedia.org/w/index.php?title=Talk%3A%C2%A3sd&type=revision&diff=845942116&oldid=845718461#representation I'm not pushing for a 50 year-old IBM extension to be added! It might be of interest to computer historians though.
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