This interesting Marg Cachet portrays a variety of scientific tools used by researchers trying to discover a cure for this horrible affliction.  This particular copy is addressed, but I would prefer to have an unaddressed copy in my collection.  If you have one, or know where I might be able to acquire an unaddressed example, please let me know at smith@in.net.  Marg produced its first cachet for the 4c Project Mercury stamp issued on February 20, 1962.