This beautiful Pennant Cachet features the hands of a scientist preparing a slide for examination.  It includes the text "Honoring the Crusade Against Cancer."  I have been unable to discover anything about this cachetmaker.  If you can help fill in the blanks, please drop me a line at smith@in.net.  I would like to find out if it's an add-on cachet or an original cachet overlooked by the Mellone Catalog.