AO-4843-2, 2013, Harry Potter, FDC, Add-on Cachet, Pictorial Postmark, Lord Voldemort, SC 4843
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Add-on cachet is:
A cachet design added to a
cover which was originally uncacheted. An add-on cachet should be
identified
by maker and date (mine are stamped on the back with the date) so that it is clear that it is not
contemporary with the cover.